Grades 9-12
Free High School Worksheets (Grades 9-12)
Printable worksheets for grades 9 through 12 across Math, Science, Language Arts, and Social Studies. Each worksheet includes a student version and a complete answer key.
Calculus: Applications of Derivatives: Optimization
Using derivatives to maximize and minimize quantities
Grade 9-12 · 15 problems
Calculus: Applications of Integration: Area Between Curves
Set up and evaluate definite integrals to find enclosed area
Grade 9-12 · 15 problems
Calculus: Derivative Rules: Power, Chain, Product, Quotient
Practice finding derivatives with the main differentiation rules
Grade 9-12 · 15 problems
Calculus: Evaluating Limits Algebraically
Using substitution, factoring, rationalizing, and limit laws
Grade 9-12 · 15 problems
Calculus: Riemann Sums and the Definite Integral
Approximating area and connecting sums to integrals
Grade 9-12 · 15 problems
Circle Theorems and Arc Length
Using angles, chords, tangents, and arc measures in circles
Grade 9-12 · 15 problems
Conditional and Independent Probability
Finding probabilities with dependent and independent events
Grade 9-12 · 15 problems
Conic Sections: Circles and Ellipses
Writing equations and analyzing key features
Grade 9-12 · 15 problems
Coordinate Geometry: Distance and Midpoint
Finding lengths and middle points on the coordinate plane
Grade 9-12 · 12 problems
Derivatives and Differentiation Rules
Applying basic rules to find rates of change
Grade 9-12 · 15 problems
Determinants and Cramer's Rule
Solving linear systems with matrices
Grade 9-12 · 12 problems
Exponential Functions and Growth
Modeling patterns of repeated multiplication
Grade 9-12 · 15 problems
Factoring Polynomials
Factoring expressions using common factors, trinomials, and special patterns
Grade 9-12 · 15 problems
Geometry: Transformations
Translations, reflections, rotations, dilations, and composition of transformations
Grade 9-12 · 15 problems
Graphing Linear and Systems of Equations
Plot lines, identify slope, and solve systems by graphing
Grade 9-12 · 15 problems
Integration and the Fundamental Theorem of Calculus
Finding antiderivatives and evaluating definite integrals
Grade 9-12 · 15 problems
Integration by Parts and Substitution
Choosing and applying two core integration techniques
Grade 9-12 · 12 problems
Introduction to Proof: Direct and Indirect
Writing logical arguments using direct proof and proof by contradiction
Grade 9-12 · 12 problems
Inverse Functions and Compositions
Finding inverses and evaluating composed functions
Grade 9-12 · 12 problems
Law of Sines and Cosines
Solving oblique triangles with side and angle relationships
Grade 9-12 · 15 problems
Linear Equations
Solve one- and two-step equations, graph lines, and interpret slope and intercept.
Grade 9-12 · 8 problems
Linear Programming and Optimization
Model constraints, find feasible regions, and optimize objective functions
Grade 9-12 · 12 problems
Math: Completing the Square
Rewrite quadratic expressions and solve quadratic equations
Grade 9-12 · 15 problems
Math: Complex Numbers and the Imaginary Unit
Working with i, simplifying powers, and performing operations with complex numbers
Grade 9-12 · 15 problems
Math: Conic Sections: Hyperbolas and Parabolas
Graphing, standard forms, foci, directrices, and asymptotes
Grade 9-12 · 12 problems
Math: Domain, Range, and Graphs of Functions
Finding domain and range from equations, graphs, and tables
Grade 9-12 · 15 problems
Math: Eigenvalues and Eigenvectors
Finding special directions and scale factors for matrices
Grade 9-12 · 10 problems
Math: Euler's Method for Differential Equations
Approximating solutions to differential equations step by step
Grade 9-12 · 10 problems
Math: First-Order Linear Differential Equations
Solving linear differential equations with integrating factors
Grade 9-12 · 12 problems
Math: Hyperbolic Functions and Their Inverses
Using definitions, identities, graphs, and inverse functions
Grade 9-12 · 12 problems
Math: Improper Integrals and Convergence Tests
Evaluating improper integrals and deciding convergence
Grade 9-12 · 12 problems
Math: Limits and Continuity
Evaluating limits and identifying continuity
Grade 9-12 · 15 problems
Math: Logarithms and Exponential Equations
Using logarithms to rewrite, evaluate, and solve exponential relationships
Grade 9-12 · 15 problems
Math: Logic and Truth Tables
Evaluating statements with logical operators
Grade 9-12 · 15 problems
Math: Parametric Equations and Polar Coordinates
Connecting parametric forms, polar forms, and Cartesian graphs
Grade 9-12 · 15 problems
Math: Partial Fractions and Integration
Decompose rational functions and use them to evaluate integrals
Grade 9-12 · 12 problems
Math: Pascal's Triangle and the Binomial Theorem
Expanding binomials and finding coefficients
Grade 9-12 · 12 problems
Math: Permutations and Combinations
Counting outcomes with order and selection
Grade 9-12 · 15 problems
Math: Precalculus: Polar Coordinates and Graphs
Convert, interpret, and graph equations in polar form
Grade 9-12 · 15 problems
Math: Slope Fields and Direction Fields
Visualizing differential equations with slopes
Grade 9-12 · 10 problems
Math: Systems of Inequalities
Solving and graphing systems of linear inequalities
Grade 9-12 · 15 problems
Math: Taylor and Maclaurin Series
Approximating functions with polynomials
Grade 9-12 · 12 problems
Math: Trigonometric Sum, Difference, and Double-Angle Identities
Use identities to simplify, evaluate, and solve trigonometric expressions
Grade 9-12 · 12 problems
Math: Unit Circle and Trigonometry
Using angles, coordinates, and trig values on the unit circle
Grade 9-12 · 15 problems
Math: Vectors and Vector Operations
Adding, subtracting, scaling, and interpreting vectors
Grade 9-12 · 15 problems
Matrix Operations and Solving Systems
Practice with matrix arithmetic, determinants, inverses, and system solving
Grade 9-12 · 15 problems
Normal Distribution and Probability
Using mean, standard deviation, and z-scores to find probabilities
Grade 9-12 · 15 problems
Piecewise and Step Functions
Evaluating, graphing, and modeling functions with intervals
Grade 9-12 · 12 problems
Polynomial Operations
Adding, subtracting, and multiplying polynomials
Grade 9-12 · 15 problems
Power Series and Radius of Convergence
Using ratio tests, centers, and endpoints
Grade 9-12 · 12 problems
Precalculus Vectors: Magnitude, Direction, and Operations
Finding vector length, angle, components, sums, and products
Grade 9-12 · 15 problems
Precalculus: Arithmetic and Geometric Sequences
Finding terms, formulas, and sums for common sequence patterns
Grade 9-12 · 15 problems
Precalculus: Exponential and Logarithmic Functions
Solving, graphing, and modeling with exponentials and logarithms
Grade 9-12 · 15 problems
Precalculus: Parametric Equations
Graphing, interpreting, and converting parametric relationships
Grade 9-12 · 15 problems
Precalculus: Rational Functions and Asymptotes
Analyze vertical, horizontal, slant asymptotes, holes, and key graph features
Grade 9-12 · 15 problems
Precalculus: Trigonometric Identities
Simplifying, verifying, and applying trigonometric identities
Grade 9-12 · 15 problems
Probability and Counting Principles
Using counting methods to find probabilities
Grade 9-12 · 15 problems
Quadratic Equations
Solving and analyzing quadratic equations
Grade 9-12 · 15 problems
Quadratic Functions and Parabolas
Graphing, analyzing, and solving quadratic relationships
Grade 9-12 · 15 problems
Rational Expressions and Equations
Simplifying, combining, and solving with rational expressions
Grade 9-12 · 15 problems
Separable First-Order Differential Equations
Solving differential equations by separating variables
Grade 9-12 · 12 problems
Sequences and Series: Arithmetic and Geometric
Finding patterns, rules, terms, and sums
Grade 9-12 · 15 problems
Systems of Equations
Solving pairs of linear equations
Grade 9-12 · 15 problems
Trigonometry Right Triangles
Using sine, cosine, and tangent in right triangles
Grade 9-12 · 15 problems
Accuracy vs Precision: Percent Error and Sources of Uncertainty
Evaluating measurements, calculations, and experimental reliability
Grade 9-12 · 15 problems
Climate Change Evidence Across Scientific Disciplines
Connecting evidence from the atmosphere, oceans, ice, ecosystems, and geology
Grade 9-12 · 15 problems
Designing a Controlled Experiment
Planning fair tests with variables, controls, and evidence
Grade 9-12 · 15 problems
Engineering Design Process Applied to Science Problems
Use criteria, constraints, testing, and iteration to solve real science challenges
Grade 9-12 · 15 problems
Forensic Science Basics: DNA Fingerprints and Chromatography
Using DNA patterns and chemical separation to analyze evidence
Grade 9-12 · 15 problems
Identifying Pseudoscience Bias and Logical Fallacies
Evaluating scientific claims, evidence, bias, and reasoning
Grade 9-12 · 15 problems
Microscope Skills: Magnification and Specimen Preparation
Using compound microscopes, calculating magnification, and preparing clear specimens
Grade 9-12 · 15 problems
Reading a Scientific Abstract and Identifying Claims
Finding claims, evidence, scope, and limits in scientific summaries
Grade 9-12 · 15 problems
Science: Biotechnology and Bioethics CRISPR, Cloning, and GMOs
Exploring gene editing, cloning, genetically modified organisms, and ethical decision-making
Grade 9-12 · 15 problems
Science: Climate Modeling: Running Simulations
Using simulations to test climate variables and interpret model results
Grade 9-12 · 12 problems
Science: Dimensional Analysis Across Disciplines
Using units to solve problems in science
Grade 9-12 · 15 problems
Science: Graphing Scientific Data Choosing the Right Chart Type
Selecting effective charts for experimental results
Grade 9-12 · 15 problems
Science: Interpreting Scatter Plots and Linear Regressions
Using data trends, best-fit lines, slopes, and residuals in science investigations
Grade 9-12 · 15 problems
Science: Lab Safety Rules, MSDS Sheets, and Emergency Procedures
Using safety rules, chemical safety information, and emergency response steps
Grade 9-12 · 15 problems
Science: Reading Data Tables and Drawing Evidence-Based Conclusions
Using patterns, comparisons, and evidence to support scientific claims
Grade 9-12 · 15 problems
Science: Renewable vs Non Renewable Energy Sources
Comparing energy sources, impacts, and tradeoffs
Grade 9-12 · 15 problems
Science: Scientific Notation and Order of Magnitude Estimation
Using powers of ten to describe and estimate scientific quantities
Grade 9-12 · 15 problems
Science: SI Units Metric Prefixes and Unit Conversions
Practice converting measurements using SI units and metric prefixes
Grade 9-12 · 15 problems
Science: Writing a Formal Lab Report
Organizing evidence, analysis, and conclusions in scientific writing
Grade 9-12 · 15 problems
Scientific Method for High School Investigations
Designing, testing, analyzing, and communicating scientific investigations
Grade 9-12 · 15 problems
Significant Figures and Rounding in Scientific Measurements
Practice reporting measurements with the correct precision
Grade 9-12 · 15 problems
Advanced Grammar: Mechanics and Syntax
Refining punctuation, sentence structure, and clarity
Grade 9-12 · 15 problems
AP Language: Argument Essay Strategies
Building defensible claims, evidence, reasoning, and commentary
Grade 9-12 · 15 problems
AP Language: Rhetorical Analysis
Analyzing rhetorical choices, audience, purpose, and effect
Grade 9-12 · 15 problems
AP Literature: Analyzing Poetry
Close reading of poetic language, structure, and meaning
Grade 9-12 · 15 problems
AP Literature: Drama and Tragic Structure
Analyzing tragedy, dramatic form, and literary meaning
Grade 9-12 · 15 problems
Language Arts: Allegory and Extended Metaphor
Identifying symbolic meaning and sustained comparison in texts
Grade 9-12 · 12 problems
Language Arts: AP Language: Synthesis Essay Skills
Building defensible claims, using sources, and writing commentary
Grade 9-12 · 12 problems
Language Arts: AP Literature: Analyzing Prose Fiction
Close reading of narration, style, characterization, and theme
Grade 9-12 · 15 problems
Language Arts: Author Study: Langston Hughes and the Jazz Age
Exploring poetry, identity, music, and the Harlem Renaissance
Grade 9-12 · 10 problems
Language Arts: Author Study: Shakespeare's Sonnets and Devices
Analyzing structure, imagery, figurative language, and themes in Shakespearean sonnets
Grade 9-12 · 10 problems
Language Arts: Bibliography and MLA Citation Practice
Practice creating MLA Works Cited entries and in-text citations
Grade 9-12 · 12 problems
Language Arts: College Essay Writing
Planning, drafting, and revising a personal college essay
Grade 9-12 · 15 problems
Language Arts: Expository Essay Writing
Organizing clear explanations with evidence and structure
Grade 9-12 · 10 problems
Language Arts: Journalism: Writing the Inverted Pyramid
Lead with the most important facts and organize news clearly
Grade 9-12 · 10 problems
Language Arts: Literary Analysis
Analyzing theme, character, tone, structure, and evidence
Grade 9-12 · 15 problems
Language Arts: Literary Theory: Marxist and Historical Criticism
Analyzing literature through class, power, and historical context
Grade 9-12 · 15 problems
Language Arts: Mythology and Allusion
Recognizing and interpreting references from myth
Grade 9-12 · 12 problems
Language Arts: Nonfiction Argument and Evidence
Identifying claims, reasons, and supporting evidence in nonfiction texts
Grade 9-12 · 12 problems
Language Arts: Parallel Structure and Sentence Variety
Improving balance, rhythm, and clarity in writing
Grade 9-12 · 15 problems
Language Arts: Persuasive Essays
Building clear claims, strong reasons, and effective evidence
Grade 9-12 · 15 problems
Language Arts: Research Writing and Citation
Using sources, paraphrasing, and citing evidence clearly
Grade 9-12 · 15 problems
Language Arts: Rhetorical Devices
Identifying and explaining persuasive language techniques
Grade 9-12 · 15 problems
Language Arts: SAT and ACT Vocabulary: High-Frequency Roots
Build vocabulary by analyzing common word roots, prefixes, and suffixes
Grade 9-12 · 14 problems
Language Arts: Symbolism in Literature
Identifying and interpreting symbols in texts
Grade 9-12 · 12 problems
Language Arts: Syntax Style and Diction
Analyzing sentence structure, word choice, and tone
Grade 9-12 · 15 problems
Language Arts: Technical Writing and Instructions
Writing clear steps, directions, and procedural texts
Grade 9-12 · 10 problems
Language Arts: Tone and Mood in Literature
Identifying how authors create feeling and attitude
Grade 9-12 · 12 problems
Language Arts: Writing for Different Audiences and Purposes
Adapting tone, style, evidence, and structure to fit a communication goal
Grade 9-12 · 12 problems
Literary Theory: Applying Feminist Criticism
Analyzing gender, power, voice, and representation
Grade 9-12 · 15 problems
Reading Comprehension
Analyze an informational passage for central ideas, evidence, author's purpose, and vocabulary.
Grade 9-12 · 8 problems
Shakespearean Language and Sonnets
Understanding early modern English, sonnet form, and poetic meaning
Grade 9-12 · 12 problems
Vocabulary: Roots, Prefixes, and Suffixes
Using word parts to understand complex vocabulary
Grade 9-12 · 15 problems
AP Government: Political Participation and Voting
Voter behavior, turnout, rights, and forms of civic action
Grade 9-12 · 15 problems
AP Government: The Bureaucracy and Executive Agencies
How federal agencies implement laws and shape public policy
Grade 9-12 · 15 problems
AP Microeconomics: Consumer Choice and Demand
Utility, budget constraints, and demand curves
Grade 9-12 · 15 problems
AP U.S. History: Colonial Period, 1607-1763
Colonization, regional development, imperial conflict, and early American society
Grade 9-12 · 15 problems
AP World History: Industrialization and Empire
Analyzing industrial growth, imperial expansion, and global change from 1750 to 1900
Grade 9-12 · 15 problems
Colonialism and Its Long-Term Effects
Examining power, resources, culture, and lasting global impacts
Grade 9-12 · 12 problems
Economics: Circular Flow of Income
How money, goods, services, and resources move through an economy
Grade 9-12 · 12 problems
Historical Thinking & Evidence
Apply historical thinking skills: causation, continuity, change, and source analysis.
Grade 9-12 · 8 problems
Social Studies: AP Government: Civil Liberties vs Civil Rights
Distinguishing individual freedoms from equal protection under the law
Grade 9-12 · 15 problems
Social Studies: AP Government: Congressional Structure and Powers
Bicameralism, lawmaking, oversight, and Article I powers
Grade 9-12 · 15 problems
Social Studies: AP Government: Supreme Court: Landmark Cases
Constitutional principles, holdings, and applications
Grade 9-12 · 15 problems
Social Studies: AP Human Geography: Ethnic and Cultural Diversity
Analyzing identity, culture, place, and spatial patterns
Grade 9-12 · 15 problems
Social Studies: AP Human Geography: Urban Land Use Patterns
Analyzing city structure, models, and spatial patterns
Grade 9-12 · 15 problems
Social Studies: AP Macroeconomics: Fiscal Policy and Government Spending
Analyzing taxes, spending, deficits, and aggregate demand
Grade 9-12 · 15 problems
Social Studies: AP Macroeconomics: GDP and National Income
Measuring output, income, and economic performance
Grade 9-12 · 15 problems
Social Studies: AP Macroeconomics: Monetary Policy and the Fed
Using money markets, policy tools, and macroeconomic effects
Grade 9-12 · 15 problems
Social Studies: AP Microeconomics: Market Structures and Monopoly
Analyzing firm behavior, market power, and monopoly outcomes
Grade 9-12 · 15 problems
Social Studies: AP US History: Cold War Domestic Politics
Analyzing anticommunism, rights, conformity, and federal power after World War II
Grade 9-12 · 15 problems
Social Studies: AP US History: Post-1980 America
Politics, economics, culture, and global change since 1980
Grade 9-12 · 15 problems
Social Studies: AP US History: Progressive Era and WWI
Reform, imperialism, war, and domestic change from 1890 to 1920
Grade 9-12 · 15 problems
Social Studies: AP US History: The Civil War Era 1848-1877
Sectional conflict, Civil War, emancipation, and Reconstruction
Grade 9-12 · 15 problems
Social Studies: AP World History: Classical Empires 600 BCE-600 CE
Comparing political systems, trade, belief systems, and imperial decline
Grade 9-12 · 15 problems
Social Studies: AP World History: Global Conflict and Independence Movements
Analyzing world wars, decolonization, and nationalist movements in the twentieth century
Grade 9-12 · 15 problems
Social Studies: AP World History: Post-Classical Trade Networks
Silk Roads, Indian Ocean, and Trans-Saharan connections from c. 1200 to c. 1450
Grade 9-12 · 15 problems
Social Studies: AP World History: River Valley Civilizations
Comparing early complex societies along major rivers
Grade 9-12 · 15 problems
Social Studies: Central Asia and the Steppes
Geography, history, culture, and connections across Eurasia
Grade 9-12 · 10 problems
Social Studies: Climate Change: Evidence and Policy
Examining scientific evidence, public policy, and civic decision-making
Grade 9-12 · 12 problems
Social Studies: Comparative Economic Systems
Comparing traditional, command, market, and mixed economies
Grade 9-12 · 15 problems
Social Studies: Decolonization and Independence Movements
Examining the end of colonial rule in Africa and Asia
Grade 9-12 · 12 problems
Social Studies: Federalism and States Rights
How power is shared between national and state governments
Grade 9-12 · 12 problems
Social Studies: GDP, Inflation, and Economic Cycles
Understanding economic growth, rising prices, and patterns in the economy
Grade 9-12 · 12 problems
Social Studies: GIS and Modern Mapping Tools
Using spatial data to understand people, places, and patterns
Grade 9-12 · 10 problems
Social Studies: Media Literacy and Evaluating Sources
Analyzing credibility, bias, evidence, and purpose in information sources
Grade 9-12 · 12 problems
Social Studies: Middle East: Geography, Religion, and Modern History
Exploring physical geography, major religions, and key events shaping the region
Grade 9-12 · 12 problems
Social Studies: Modern Global Issues
Exploring challenges that affect countries and people around the world
Grade 9-12 · 15 problems
Social Studies: Philosophy and Ethics: Key Thinkers
Major ideas from influential philosophers in ethics and political thought
Grade 9-12 · 12 problems
Social Studies: Population Geography and Demographics
Exploring population patterns, change, and distribution
Grade 9-12 · 12 problems
Social Studies: State Constitutions and Local Government
Exploring state powers, local responsibilities, and civic participation
Grade 9-12 · 10 problems
Social Studies: Sub-Saharan Africa: Cultures and Modern States
Exploring cultural diversity, colonial legacies, and contemporary nations
Grade 9-12 · 12 problems
Social Studies: Taxes and Government Revenue
Understanding how governments collect and use public money
Grade 9-12 · 12 problems
Social Studies: The Civil Rights Movement
Key events, leaders, laws, and goals of the movement
Grade 9-12 · 15 problems
Social Studies: The Cold War: US vs USSR
Comparing superpowers, conflicts, and global influence
Grade 9-12 · 12 problems
Social Studies: The Constitution and Bill of Rights
Exploring the structure of government and individual rights
Grade 9-12 · 15 problems
Social Studies: The Federal Court System and Due Process
Understanding federal courts, constitutional protections, and fair legal procedures
Grade 9-12 · 12 problems
Social Studies: The French Revolution
Causes, events, and effects of revolution in France
Grade 9-12 · 12 problems
Social Studies: The Gilded Age and the Rise of Industry
Industrial growth, big business, labor, and reform in the late 1800s
Grade 9-12 · 12 problems
Social Studies: The Great Depression and New Deal
Causes, effects, and government responses in the 1930s
Grade 9-12 · 12 problems
Social Studies: The Harlem Renaissance
Exploring a major cultural movement in African American history
Grade 9-12 · 12 problems
Social Studies: The Industrial Revolution
Inventions, factory work, and social change
Grade 9-12 · 12 problems
Social Studies: The Ottoman Empire: Rise and Fall
Power, expansion, reform, and decline from Anatolia to World War I
Grade 9-12 · 12 problems
Social Studies: The Partition of India and Pakistan
Causes, consequences, and human experiences of 1947
Grade 9-12 · 10 problems
Social Studies: The Progressive Era
Reform movements, government change, and social issues in the early 1900s
Grade 9-12 · 12 problems
Social Studies: The Qing Dynasty and Modern China
Imperial rule, foreign pressure, reform, revolution, and historical memory
Grade 9-12 · 12 problems
Social Studies: The Russian Revolution
Causes, key events, and consequences of revolutionary change in Russia
Grade 9-12 · 12 problems
Social Studies: The Space Race and Cold War Technology
How competition in space shaped politics, science, and daily life
Grade 9-12 · 12 problems
Social Studies: The United Nations and International Organizations
Exploring global cooperation, peace, and international decision-making
Grade 9-12 · 12 problems
Social Studies: The Vietnam War and Its Legacy
Causes, events, and long-term effects of the conflict
Grade 9-12 · 12 problems
Social Studies: US Foreign Policy and Diplomacy
Key goals, tools, and historical examples of diplomacy
Grade 9-12 · 12 problems
Social Studies: World War I Trench Warfare and New Technology
How industrial warfare changed combat on the Western Front
Grade 9-12 · 12 problems
Social Studies: World War I: Causes, Events, and Effects
Examining the origins, major developments, and consequences of World War I
Grade 9-12 · 12 problems
Social Studies: World War II and the Holocaust
Major events, causes, and human impact
Grade 9-12 · 15 problems
Social Studies: World War II: Pacific Theater and Home Front
Major events, strategies, and life during wartime
Grade 9-12 · 12 problems
The Enlightenment and Its Influence
Ideas about rights, government, reason, and reform
Grade 9-12 · 12 problems
Art History: Art as Communication: Symbols and Meaning
Interpreting visual symbols across cultures and time periods
Grade 9-12 · 15 problems
Art History: Asian Art: Chinese Painting and Japanese Woodblock Prints
Comparing materials, themes, composition, and cultural context
Grade 9-12 · 12 problems
Art History: Baroque to Rococo: Drama and Decoration
Comparing dramatic movement, emotion, ornament, and elegance in European art
Grade 9-12 · 12 problems
Art History: Renaissance Masters: Da Vinci, Michelangelo, Raphael
Comparing three defining artists of the Italian High Renaissance
Grade 9-12 · 12 problems
Astronomy: Black Holes and Neutron Stars
Exploring compact objects formed from massive stars
Grade 9-12 · 12 problems
Astronomy: Dark Matter and Dark Energy
Exploring the invisible ingredients of the universe
Grade 9-12 · 12 problems
Astronomy: Detecting Exoplanets: Transit and Radial Velocity
Using starlight to find planets around other stars
Grade 9-12 · 15 problems
Astronomy: Hubble's Law and the Expanding Universe
Using galaxy velocities and distances to understand cosmic expansion
Grade 9-12 · 12 problems
Astronomy: Stellar Nucleosynthesis: Where Elements Come From
How stars build elements through fusion and explosive events
Grade 9-12 · 15 problems
Astronomy: The Big Bang and Cosmology
Exploring evidence for an expanding universe
Grade 9-12 · 12 problems
Astronomy: The James Webb Space Telescope and Infrared Astronomy
Exploring the universe with infrared light
Grade 9-12 · 12 problems
Biology: Animal Behavior: Innate vs Learned
Classifying behaviors and explaining how animals acquire them
Grade 9-12 · 15 problems
Biology: AP Biology: Energy Flow and the Laws of Thermodynamics
Connecting free energy, entropy, and biological systems
Grade 9-12 · 12 problems
Biology: AP Biology: Hardy-Weinberg Equilibrium
Using allele frequencies to model population genetics
Grade 9-12 · 12 problems
Biology: AP Biology: Signal Transduction and Cell Communication
Receptors, pathways, amplification, and cellular responses
Grade 9-12 · 12 problems
Biology: ATP and Cellular Energy Currency
How cells store, transfer, and use energy
Grade 9-12 · 15 problems
Biology: Biochemistry: Carbohydrates, Proteins, Lipids, Nucleic Acids
Structure and function of the four major biological macromolecules
Grade 9-12 · 15 problems
Biology: Biotechnology: PCR and Gel Electrophoresis
Amplifying DNA and analyzing fragment sizes
Grade 9-12 · 15 problems
Biology: Cell Membrane Structure and Selective Permeability
How membrane structure controls what enters and leaves cells
Grade 9-12 · 15 problems
Biology: Ecology: Population Growth and Carrying Capacity
Modeling how populations change over time
Grade 9-12 · 15 problems
Biology: Ecology: Symbiosis: Mutualism, Commensalism, Parasitism
Classifying ecological relationships by costs and benefits
Grade 9-12 · 15 problems
Biology: Evolution: Evidence and Mechanisms
Analyzing evidence for common ancestry and processes that change populations
Grade 9-12 · 15 problems
Biology: Genetics: DNA Replication and Repair
How cells copy DNA accurately and fix damage
Grade 9-12 · 15 problems
Biology: Genetics: Mutations and Their Effects
How DNA changes can affect proteins, traits, and populations
Grade 9-12 · 15 problems
Biology: Genetics: Transcription and Translation
From DNA instructions to proteins
Grade 9-12 · 15 problems
Biology: Microbiology: Bacteria, Viruses, and Antibiotics
Comparing microbes and explaining how antibiotics work
Grade 9-12 · 12 problems
Biology: Plant Hormones and Tropisms
How chemical signals guide plant growth and responses
Grade 9-12 · 15 problems
Biology: The Endocrine System: Hormones and Feedback Loops
How hormones regulate body systems and maintain homeostasis
Grade 9-12 · 12 problems
Biology: The Excretory System: Kidneys, Filtration, and Homeostasis
How kidneys filter blood and help maintain internal balance
Grade 9-12 · 12 problems
Calculus: Derivatives
Finding and interpreting rates of change
Grade 9-12 · 15 problems
Calculus: Integrals
Finding antiderivatives, definite integrals, and area under curves
Grade 9-12 · 15 problems
Cell Biology
Compare prokaryotic and eukaryotic cells, identify organelles, and explain cell processes.
Grade 9-12 · 8 problems
Chemical Bonding: Ionic and Covalent
Comparing how atoms bond and form compounds
Grade 9-12 · 12 problems
Chemistry: Acid-Base Chemistry: Buffers and Titration Curves
Using buffer equations and interpreting acid-base titration graphs
Grade 9-12 · 15 problems
Chemistry: AP Chemistry: Spectroscopy and Beer-Lambert Law
Using absorbance, concentration, path length, and spectra
Grade 9-12 · 12 problems
Chemistry: Chemical Equilibrium and Le Chatelier's Principle
Predicting shifts in reversible reactions
Grade 9-12 · 15 problems
Chemistry: Covalent Bonding and Molecular Geometry (VSEPR)
Predicting molecular shapes from Lewis structures and electron domains
Grade 9-12 · 15 problems
Chemistry: Electrochemistry: Galvanic and Electrolytic Cells
Comparing spontaneous and nonspontaneous redox reactions in cells
Grade 9-12 · 12 problems
Chemistry: Intermolecular Forces and Physical Properties
Connecting particle attractions to boiling point, solubility, vapor pressure, and more
Grade 9-12 · 15 problems
Chemistry: Ionic Bonding and Lattice Structures
Electron transfer, crystal lattices, and properties of ionic compounds
Grade 9-12 · 15 problems
Chemistry: Kinetics: Reaction Rates and Activation Energy
Calculating reaction rates and explaining energy barriers
Grade 9-12 · 12 problems
Chemistry: Nuclear Chemistry: Fission, Fusion, and Decay
Balancing nuclear reactions and understanding radioactive processes
Grade 9-12 · 12 problems
Chemistry: Organic Chemistry: Nomenclature and Isomers
Practice naming organic compounds and identifying isomers
Grade 9-12 · 15 problems
Chemistry: Organic Chemistry: Polymerization Reactions
How monomers join to form addition and condensation polymers
Grade 9-12 · 12 problems
Chemistry: Periodic Trends: Atomic Radius, Ionization Energy
Using the periodic table to predict atomic size and energy needed to remove electrons
Grade 9-12 · 15 problems
Chemistry: Polymers, Plastics, and Materials Science
Exploring polymer structure, properties, and uses
Grade 9-12 · 12 problems
Chemistry: Quantum Mechanical Model of the Atom
Orbitals, quantum numbers, and electron configurations
Grade 9-12 · 15 problems
Chemistry: Reaction Mechanisms and Activation Energy
Connecting reaction pathways, rate-determining steps, and energy changes
Grade 9-12 · 15 problems
Chemistry: Solution Chemistry: Molarity and Dilution
Calculating concentration, moles, volume, and dilution
Grade 9-12 · 15 problems
Chemistry: Thermochemistry: Enthalpy and Hess's Law
Calculating heat, enthalpy changes, and reaction pathways
Grade 9-12 · 12 problems
Computer Science: Binary and Data Representation
Representing numbers, text, images, and sound with bits
Grade 9-12 · 15 problems
Computer Science: Internet and Networks
How data moves, devices connect, and networks communicate
Grade 9-12 · 15 problems
Computer Science: Logic Gates
Building and analyzing Boolean logic circuits
Grade 9-12 · 15 problems
CS: Arrays and Lists
Storing, accessing, and updating ordered data
Grade 9-12 · 12 problems
CS: Big-O Notation and Algorithm Efficiency
Comparing how algorithms grow as input size increases
Grade 9-12 · 12 problems
CS: Computer Networks: TCP, UDP, and the OSI Model
Comparing transport protocols and understanding layered network design
Grade 9-12 · 12 problems
CS: Cryptography: Ciphers and Encryption
Practice with classic ciphers, keys, encryption, and security ideas
Grade 9-12 · 12 problems
CS: Databases and SQL Basics
Understanding tables, queries, keys, and simple SQL commands
Grade 9-12 · 12 problems
CS: Dynamic Programming: Memoization and Tabulation
Solving overlapping subproblems with saved results
Grade 9-12 · 12 problems
CS: Functions and Parameters
Writing reusable code with inputs and return values
Grade 9-12 · 12 problems
CS: Graph Algorithms: BFS and DFS
Exploring breadth-first search and depth-first search on graphs
Grade 9-12 · 12 problems
CS: Java: Classes, Methods, and Public Static Void Main
Understanding Java program structure, methods, and the main method
Grade 9-12 · 12 problems
CS: Loops and Control Flow
Tracing, writing, and reasoning about loops and decisions
Grade 9-12 · 15 problems
CS: Machine Learning and Artificial Intelligence Basics
Understanding data, models, training, and responsible AI
Grade 9-12 · 12 problems
CS: Merge Sort and Quick Sort Algorithms
Comparing divide-and-conquer sorting strategies
Grade 9-12 · 12 problems
CS: Neural Networks: From Perceptron to Deep Learning
How artificial neurons learn patterns from data
Grade 9-12 · 12 problems
CS: Recursion and Base Cases
Tracing recursive calls and identifying stopping conditions
Grade 9-12 · 12 problems
CS: Regular Expressions: Patterns and Matching
Finding text patterns with regex syntax
Grade 9-12 · 12 problems
CS: Sorting Algorithms: Bubble, Selection, and Insertion
Tracing, comparing, and choosing basic sorting algorithms
Grade 9-12 · 12 problems
CS: SQL: SELECT, WHERE, JOIN
Querying tables, filtering rows, and combining data
Grade 9-12 · 12 problems
Data Structures: Stacks, Queues, and Trees
Practice core operations and use cases for common data structures
Grade 9-12 · 12 problems
Drama: Shakespeare on Stage: Iambic Pentameter and Soliloquy
Performing Shakespeare through rhythm, voice, and inner thought
Grade 9-12 · 10 problems
Drama: Tech Theater: Lights, Sound, and Stage Design
Planning technical choices that support a stage production
Grade 9-12 · 10 problems
Earth Science: Desertification and Land Degradation
Causes, impacts, and solutions for dryland ecosystems
Grade 9-12 · 12 problems
Earth Science: Glaciers, Ice Sheets, and Sea Level
How land ice, ocean water, and climate interact
Grade 9-12 · 12 problems
Earth Science: Plate Boundaries: Convergent, Divergent, Transform
Identifying plate interactions and the landforms they create
Grade 9-12 · 12 problems
Earth Science: The Coriolis Effect and Global Wind Patterns
How Earth's rotation shapes winds and circulation cells
Grade 9-12 · 12 problems
Earths Atmosphere and Climate Change
Atmospheric layers, greenhouse gases, and human impacts on climate
Grade 9-12 · 15 problems
Electric Fields and Electric Potential
Describing forces, field strength, and electric potential
Grade 9-12 · 12 problems
Engineering: Civil and Structural
Forces, materials, design constraints, and safety in the built environment
Grade 9-12 · 15 problems
Engineering: Engineering Design Process
Defining problems, creating solutions, testing prototypes, and improving designs
Grade 9-12 · 15 problems
Environmental Science: Biodiversity
Exploring species, genetic, and ecosystem diversity
Grade 9-12 · 15 problems
Environmental Science: Climate Change
Causes, evidence, impacts, and solutions
Grade 9-12 · 15 problems
Environmental Science: Climate Models and Prediction
Using evidence, scenarios, and uncertainty to understand future climate
Grade 9-12 · 15 problems
Environmental Science: Environmental Justice and Equity
Analyzing fairness in environmental risks, benefits, and decision-making
Grade 9-12 · 10 problems
Environmental Science: Environmental Policy and the EPA
How laws, regulations, and the EPA protect people and the environment
Grade 9-12 · 12 problems
Environmental Science: Geoengineering Risks and Proposals
Evaluating climate intervention ideas, benefits, uncertainties, and ethics
Grade 9-12 · 10 problems
Environmental Science: Ocean Acidification and Coral Reefs
How changing ocean chemistry affects reef ecosystems
Grade 9-12 · 12 problems
Environmental Science: Renewable Energy
Comparing clean energy sources, impacts, and tradeoffs
Grade 9-12 · 15 problems
Environmental Science: Sustainability and Ecological Footprint
Analyzing resource use, waste, and sustainable choices
Grade 9-12 · 12 problems
Environmental Science: The Nitrogen and Phosphorus Cycles
How essential nutrients move through ecosystems
Grade 9-12 · 12 problems
Environmental Science: Urban Heat Islands and City Planning
How city design affects temperature, energy use, and public health
Grade 9-12 · 12 problems
Evolution: Phylogenetic Trees and Cladistics
Reading evolutionary relationships using shared derived traits
Grade 9-12 · 15 problems
Financial Literacy: Budgeting and Saving
Build a budget, track spending, and plan savings goals
Grade 9-12 · 15 problems
Financial Literacy: College Costs and Financial Aid
Understanding tuition, aid, loans, and true college costs
Grade 9-12 · 12 problems
Financial Literacy: Credit Scores and Borrowing Responsibly
Understanding credit scores, credit reports, and smart borrowing choices
Grade 9-12 · 15 problems
Financial Literacy: Cryptocurrency Basics and Volatility
Understanding digital assets, risk, and price changes
Grade 9-12 · 12 problems
Financial Literacy: Insurance: Protecting Against Risk
Understanding premiums, deductibles, coverage, and risk management
Grade 9-12 · 15 problems
Financial Literacy: Investing: Stocks, Bonds, and Mutual Funds
Comparing investment types, risk, return, and diversification
Grade 9-12 · 15 problems
Financial Literacy: Reading a Pay Stub: Gross, Net, and Deductions
Understanding earnings, taxes, deductions, and take-home pay
Grade 9-12 · 12 problems
Financial Literacy: Renting vs Buying a Home
Comparing costs, benefits, risks, and long-term financial impact
Grade 9-12 · 12 problems
Financial Literacy: Retirement Accounts: 401(k) and IRA Basics
Understanding workplace plans, IRAs, taxes, matching, and long-term growth
Grade 9-12 · 12 problems
Financial Literacy: Student Loans and Repayment
Understanding borrowing costs, repayment plans, and smart loan decisions
Grade 9-12 · 12 problems
Financial Literacy: Taxes: How They Work and Where They Go
Understanding tax types, calculations, and public services
Grade 9-12 · 15 problems
Foreign Languages: Latin Roots
Building vocabulary through Latin word parts
Grade 9-12 · 15 problems
Geometry: Circles
Angles, arcs, chords, tangents, and circle equations
Grade 9-12 · 15 problems
Geometry: Coordinate Geometry
Using coordinates to analyze distance, slope, midpoint, and equations of lines
Grade 9-12 · 15 problems
Geometry: Transformations (High School)
Translations, reflections, rotations, dilations, and compositions on the coordinate plane
Grade 9-12 · 15 problems
Geometry: Triangles (High School)
Classifying triangles, proving congruence, and solving for missing measures
Grade 9-12 · 15 problems
Health: Drug and Alcohol Effects on the Body
How substances affect body systems, behavior, and safety
Grade 9-12 · 12 problems
Health: Genetics and Inherited Conditions
Understanding inheritance, risk, and healthy decision-making
Grade 9-12 · 12 problems
Health: Mental Health: Stress, Anxiety, and Coping
Recognizing stress responses and practicing healthy coping skills
Grade 9-12 · 12 problems
Health: The Reproductive System and Human Development
Understanding body systems, puberty, pregnancy, and prenatal growth
Grade 9-12 · 12 problems
Kinematics: Velocity, Acceleration, and Motion Graphs
Interpreting motion with equations, graphs, and units
Grade 9-12 · 12 problems
Mitosis and Meiosis: Cell Division
Comparing how cells grow, repair, and form gametes
Grade 9-12 · 12 problems
Music: Music History: Classical, Jazz, and Rock
Tracing major styles, composers, performers, and cultural influences
Grade 9-12 · 15 problems
Music: Music Theory: Intervals and Chord Inversions
Identifying intervals, triads, seventh chords, and inversions
Grade 9-12 · 12 problems
Music: Music Theory: Major and Minor Scales
Identifying, building, and comparing major and minor scales
Grade 9-12 · 12 problems
Object-Oriented Programming: Classes and Objects
Practice identifying classes, objects, attributes, and methods
Grade 9-12 · 12 problems
Philosophy: Branches of Philosophy
Ethics, logic, metaphysics, and epistemology
Grade 9-12 · 12 problems
Philosophy: Eastern Philosophy: Confucius, Buddhism, and Daoism
Comparing major ideas from Confucianism, Buddhism, and Daoism
Grade 9-12 · 12 problems
Philosophy: Ethics: Utilitarianism vs Deontology
Comparing consequences, duties, and moral decision making
Grade 9-12 · 12 problems
Philosophy: Existentialism: Kierkegaard, Nietzsche, Sartre
Exploring choice, meaning, faith, freedom, and responsibility
Grade 9-12 · 12 problems
Philosophy: Logic and Critical Thinking
Evaluating arguments, evidence, and fallacies
Grade 9-12 · 15 problems
Philosophy: Philosophy of Science: What Makes Knowledge Reliable
Evaluating evidence, methods, and trust in scientific knowledge
Grade 9-12 · 12 problems
Physical Education: Injury Prevention and Stretching
Safe movement habits for active bodies
Grade 9-12 · 10 problems
Physical Education: Nutrition for Athletes: Fueling Performance
Choosing foods and fluids that support training, recovery, and health
Grade 9-12 · 12 problems
Physical Education: Sports Science: How the Body Performs
Exploring energy systems, movement, fitness, and performance
Grade 9-12 · 15 problems
Physics: AP Physics 1: Rotational Kinematics and Dynamics
Angular motion, torque, rotational inertia, and equilibrium
Grade 9-12 · 12 problems
Physics: AP Physics 2: Thermodynamics and Heat Engines
Work, heat, internal energy, entropy, and engine efficiency
Grade 9-12 · 12 problems
Physics: AP Physics C Mechanics: Center of Mass and Moment of Inertia
Calculating centers of mass and rotational inertia for systems and continuous bodies
Grade 9-12 · 12 problems
Physics: Capacitors, Inductors, and RLC Circuits
Energy storage, time constants, reactance, resonance, and AC circuit behavior
Grade 9-12 · 12 problems
Physics: Circular Motion and Centripetal Acceleration
Calculating speed, period, force, and inward acceleration
Grade 9-12 · 15 problems
Physics: DC Circuits: Ohm's Law and Kirchhoff's Rules
Analyze current, voltage, resistance, and conservation laws in DC circuits
Grade 9-12 · 15 problems
Physics: Electric Forces and Coulomb's Law
Calculating electric forces between charged particles
Grade 9-12 · 15 problems
Physics: Electromagnetic Induction and Faraday's Law
Calculating induced emf and predicting induced current direction
Grade 9-12 · 15 problems
Physics: Gravitational Fields and Orbital Mechanics
Calculating gravitational force, field strength, orbital speed, and period
Grade 9-12 · 12 problems
Physics: Kinematics: Velocity-Time and Position-Time Graphs
Interpreting slope, area, displacement, and acceleration
Grade 9-12 · 15 problems
Physics: Magnetic Forces on Moving Charges
Calculating force magnitude, direction, and charged particle motion in magnetic fields
Grade 9-12 · 15 problems
Physics: Momentum, Impulse, and Conservation
Calculating momentum, impulse, and collision outcomes
Grade 9-12 · 15 problems
Physics: Newton's Laws: Free Body Diagrams and Net Force
Drawing forces and calculating the motion they cause
Grade 9-12 · 15 problems
Physics: Newton's Third Law
Action and reaction forces in everyday situations
Grade 9-12 · 15 problems
Physics: Optics: Lenses, Mirrors, and Ray Diagrams
Using ray diagrams and equations to predict image properties
Grade 9-12 · 15 problems
Physics: Photoelectric Effect and Wave-Particle Duality
Connecting photons, electrons, and matter waves
Grade 9-12 · 12 problems
Physics: Relative Motion and Reference Frames
Describing motion from different points of view
Grade 9-12 · 12 problems
Physics: Rotational Motion and Torque
Angular motion, torque, rotational inertia, and equilibrium
Grade 9-12 · 12 problems
Physics: Simple Harmonic Motion and Pendulums
Analyzing springs, pendulums, period, frequency, and energy
Grade 9-12 · 12 problems
Physics: Special Relativity: Time Dilation and Length Contraction
Using the Lorentz factor to compare measurements in different frames
Grade 9-12 · 12 problems
Physics: Standard Model of Particle Physics
Classifying particles and interactions
Grade 9-12 · 12 problems
Physics: Standing Waves and Resonance
Nodes, antinodes, harmonics, and resonant frequencies
Grade 9-12 · 15 problems
Physics: Two-Dimensional Projectile Motion
Resolving vectors and predicting projectile paths
Grade 9-12 · 15 problems
Physics: Work, Energy, and the Work-Energy Theorem
Calculating work, kinetic energy, potential energy, and net work
Grade 9-12 · 15 problems
Psychology: AP Psychology: States of Consciousness and Sleep Stages
Identifying sleep stages, biological rhythms, and altered states
Grade 9-12 · 12 problems
Psychology: AP Psychology: Statistics and Research in Psychology
Designing studies, interpreting data, and evaluating evidence
Grade 9-12 · 12 problems
Psychology: Biological Bases of Behavior: Brain and Neurons
Exploring how the nervous system supports thought, emotion, and behavior
Grade 9-12 · 15 problems
Psychology: Cognition: Problem Solving and Decision Making
How people use strategies, shortcuts, and evidence to choose and solve
Grade 9-12 · 15 problems
Psychology: Developmental Psychology: Stages of Life
How people grow and change from prenatal development through late adulthood
Grade 9-12 · 15 problems
Psychology: Introduction: History and Major Perspectives
Tracing psychology from early ideas to modern approaches
Grade 9-12 · 15 problems
Psychology: Learning: Classical and Operant Conditioning
Comparing how people and animals learn through associations and consequences
Grade 9-12 · 15 problems
Psychology: Memory: Encoding, Storage, and Retrieval
How information enters, stays in, and comes out of memory
Grade 9-12 · 15 problems
Psychology: Motivation and Emotion
Exploring why people act and how feelings influence behavior
Grade 9-12 · 15 problems
Psychology: Personality Theories: Freud, Jung, Rogers
Comparing psychodynamic, analytic, and humanistic views of personality
Grade 9-12 · 15 problems
Psychology: Psychological Disorders and the DSM
Classifying disorders while thinking critically and ethically
Grade 9-12 · 15 problems
Psychology: Research Methods: Experimental Design and Ethics
Designing fair studies and protecting participants
Grade 9-12 · 15 problems
Psychology: Sensation and Perception
How the brain detects, organizes, and interprets sensory information
Grade 9-12 · 15 problems
Psychology: Social Psychology: Conformity, Obedience, Bias
How groups, authority, and thinking patterns influence behavior
Grade 9-12 · 15 problems
Psychology: Treatments: Therapy, Medication, and CBT
Comparing common mental health treatments and how they work
Grade 9-12 · 15 problems
Science: Atomic Structure and Electron Configuration
Understanding atoms, subatomic particles, and how electrons are arranged
Grade 9-12 · 12 problems
Science: Balancing Chemical Equations
Using coefficients to conserve atoms in reactions
Grade 9-12 · 15 problems
Science: Circular Motion and Centripetal Force
Understanding inward force, speed, radius, and acceleration in circular paths
Grade 9-12 · 12 problems
Science: Conservation of Energy
How energy changes form while the total amount stays constant
Grade 9-12 · 15 problems
Science: DNA Structure and Protein Synthesis
Exploring how genetic information is stored and used to build proteins
Grade 9-12 · 15 problems
Science: Ecological Succession
How ecosystems change over time
Grade 9-12 · 12 problems
Science: Ecology and Biodiversity
Exploring ecosystems, species interactions, and the value of biodiversity
Grade 9-12 · 15 problems
Science: Energy Thermodynamics and Heat Transfer
Thermal energy, the laws of thermodynamics, and mechanisms of heat transfer
Grade 9-12 · 15 problems
Science: Enzymes and Metabolic Pathways
How enzymes speed reactions and organize metabolism
Grade 9-12 · 12 problems
Science: Fluid Mechanics: Pressure and Buoyancy
Exploring pressure in fluids and the forces that make objects float or sink
Grade 9-12 · 12 problems
Science: Free Body Diagrams
Identifying forces acting on objects
Grade 9-12 · 15 problems
Science: Gas Laws: Boyles, Charles, and Ideal Gas
Relating pressure, volume, temperature, and moles in gases
Grade 9-12 · 12 problems
Science: Laws of Thermodynamics
Understanding energy, entropy, and thermal systems
Grade 9-12 · 12 problems
Science: Lenses and Mirrors
Exploring reflection, refraction, and image formation
Grade 9-12 · 15 problems
Science: Magnetic Fields and Electromagnetic Induction
Exploring how magnets, currents, and changing fields interact
Grade 9-12 · 12 problems
Science: Momentum and Collisions
Using mass, velocity, and conservation of momentum
Grade 9-12 · 15 problems
Science: Naming Chemical Compounds
Practice naming ionic and covalent compounds
Grade 9-12 · 12 problems
Science: Newtons Laws of Motion
Understanding inertia, force, mass, and action-reaction pairs
Grade 9-12 · 15 problems
Science: Nuclear Physics and Radioactivity
Atomic nuclei, decay, half-life, and radiation safety
Grade 9-12 · 12 problems
Science: Ohm's Law and Electric Circuits
Using voltage, current, and resistance in simple circuits
Grade 9-12 · 15 problems
Science: Optics: Reflection, Refraction, and Lenses
How light reflects, bends, and forms images through lenses
Grade 9-12 · 12 problems
Science: Organic Chemistry: Functional Groups and Reactions
Identifying common functional groups and predicting basic organic reactions
Grade 9-12 · 12 problems
Science: Osmosis, Diffusion, and Active Transport
Comparing passive and active movement across cell membranes
Grade 9-12 · 12 problems
Science: Periodic Table Trends
Exploring patterns in atomic size, ionization energy, and electronegativity
Grade 9-12 · 15 problems
Science: pH Scale and Acids and Bases
Using the pH scale to classify acids, bases, and neutral substances
Grade 9-12 · 15 problems
Science: Photosynthesis: Light Reactions and Calvin Cycle
Tracing energy and matter through the two main stages of photosynthesis
Grade 9-12 · 12 problems
Science: Plate Tectonics
Earth's moving plates and their effects
Grade 9-12 · 15 problems
Science: Population Ecology and Growth Models
Exploring how populations change over time
Grade 9-12 · 12 problems
Science: Projectile Motion
Analyzing motion in two dimensions under gravity
Grade 9-12 · 15 problems
Science: Redox Reactions and Electrochemistry
Oxidation, reduction, and electron flow in chemical systems
Grade 9-12 · 12 problems
Science: Series and Parallel Circuits
Comparing current, voltage, and resistance in circuit types
Grade 9-12 · 15 problems
Science: Solution Chemistry: Molarity and Concentration
Calculating molarity, dilution, and concentration relationships
Grade 9-12 · 12 problems
Science: Stoichiometry Calculations
Using balanced equations to calculate amounts of reactants and products
Grade 9-12 · 15 problems
Science: The Cell Cycle and Cancer
How normal cell division is controlled and how cancer can develop
Grade 9-12 · 12 problems
Science: The Endocrine System and Hormones
Understanding glands, hormones, and body regulation
Grade 9-12 · 12 problems
Science: The Mole and Avogadros Number
Using the mole to count particles in chemistry
Grade 9-12 · 12 problems
Science: Waves and Sound
Exploring wave behavior, sound properties, and real-world applications
Grade 9-12 · 15 problems
Science: Work, Energy, and Power
Calculating force, motion, energy changes, and power
Grade 9-12 · 12 problems
SEL: Coping with Loss, Grief, and Change
Building healthy strategies for difficult transitions
Grade 9-12 · 10 problems
SEL: Goal Setting and Long-Term Planning
Building realistic goals, action steps, and reflection habits
Grade 9-12 · 10 problems
SEL: Healthy Relationships and Boundaries
Recognizing respect, communication, consent, and personal limits
Grade 9-12 · 10 problems
SEL: Identity and Self-Awareness
Exploring values, strengths, roles, and personal growth
Grade 9-12 · 15 problems
SEL: Leadership and Community Engagement
Practicing ethical leadership, service, and collaboration
Grade 9-12 · 15 problems
SEL: Self-Regulation Strategies for High School
Practicing tools for managing emotions, stress, and choices
Grade 9-12 · 10 problems
Statistics: ANOVA: Comparing Multiple Groups
Using one-way ANOVA to compare three or more means
Grade 9-12 · 15 problems
Statistics: Bayes' Theorem and Conditional Probability
Using conditional probability, tables, trees, and Bayes' theorem
Grade 9-12 · 15 problems
Statistics: Chi-Square Tests
Goodness of fit, independence, and homogeneity
Grade 9-12 · 12 problems
Statistics: Confidence Intervals and Margin of Error
Estimating population values with samples
Grade 9-12 · 12 problems
Statistics: Descriptive Statistics (High School)
Summarizing data with center, spread, and shape
Grade 9-12 · 15 problems
Statistics: Experimental Design: Control Groups and Confounds
Identifying control groups, treatments, and hidden variables
Grade 9-12 · 15 problems
Statistics: Hypothesis Testing: Null and Alternate
Writing null and alternate hypotheses for claims
Grade 9-12 · 12 problems
Statistics: Linear Regression and Line of Best Fit
Modeling relationships with scatterplots, slope, residuals, and predictions
Grade 9-12 · 12 problems
Statistics: Logistic Regression and Categorical Outcomes
Modeling probabilities for yes-or-no outcomes
Grade 9-12 · 12 problems
Statistics: Multiple Regression and Interaction Terms
Interpreting models with more than one predictor
Grade 9-12 · 12 problems
Statistics: Non-Parametric Tests: When Assumptions Fail
Choosing and using rank-based tests when standard assumptions are not met
Grade 9-12 · 15 problems
Statistics: Probability Distributions
Modeling outcomes with discrete and continuous distributions
Grade 9-12 · 15 problems
Statistics: Probability Rules: Addition and Multiplication
Using addition, multiplication, and conditional probability rules
Grade 9-12 · 12 problems
Statistics: Regression Diagnostics: Residuals and Conditions
Using residuals to check whether a linear regression model is appropriate
Grade 9-12 · 15 problems
Statistics: Sampling
Designing and evaluating samples for statistical studies
Grade 9-12 · 15 problems
Statistics: Scatter Plots and Correlation
Interpreting patterns, direction, strength, and linear association
Grade 9-12 · 12 problems
Statistics: The Binomial Distribution
Modeling repeated trials with two possible outcomes
Grade 9-12 · 12 problems
Statistics: The Normal Distribution and Z-Scores
Using z-scores to compare values and estimate normal probabilities
Grade 9-12 · 12 problems
Statistics: Time Series Analysis: Trends, Seasonality, and Cycles
Identifying patterns in data collected over time
Grade 9-12 · 12 problems
Statistics: Two-Way Tables and Conditional Probability
Using counts to find conditional probabilities
Grade 9-12 · 12 problems
World Languages: French: Passé Composé and Past-Tense Verbs
Forming and using the passé composé with avoir and être
Grade 9-12 · 12 problems
World Languages: Latin: Noun Declensions and Cases
Identifying noun forms, cases, numbers, and declensions
Grade 9-12 · 12 problems
World Languages: Spanish: Ser vs Estar
Choosing the correct verb for identity, traits, location, condition, and events
Grade 9-12 · 12 problems
Showing all 414 high school worksheets