For Ages 14 to 18

Grades 9-12 Tools & Labs

45 interactive tools plus 25 investigation labs for high school. Algebra through calculus, statistics, AP Biology, AP Chemistry, AP Physics, earth science, and computer science. Everything runs free in the browser with no accounts required.

45 tools 25 labs CCSS, NGSS & AP aligned
Math Statistics Biology Chemistry Physics Earth Science CS

Math & Calculus

Algebra, Precalculus & Calculus

From linear systems and polynomial roots through derivatives and integrals. Covers CCSS HSA and HSF domains plus AP Calculus AB/BC concepts.

Linear Equation Solver

Solve systems of linear equations with step-by-step Gaussian elimination, interactive matrix visualization, and exact fraction arithmetic.

HSA-REI.6, HSA-REI.8

Quadratic Equation Solver

Solve ax squared + bx + c = 0 with an interactive graph. See roots, vertex, discriminant, and step-by-step solutions.

HSA-REI.4, HSA-SSE.3

Systems of Equations Solver (3+ Variables)

Solve 2x2 through 5x5 systems with Gaussian elimination. Step-by-step row operations, augmented matrix display, determinant, and solution classification.

HSA-REI.6

Polynomial Factoring & Roots Explorer

Factor polynomials up to degree 4 and find roots with step-by-step solutions.

HSA-APR.3, HSA-SSE.2

Function Graph Explorer

Plot functions, explore properties, and see step-by-step derivative analysis with interactive graphing.

HSF-IF.7, HSF-BF.3

Derivative Rules Step-by-Step

Select from 23 preset examples across 8 rule categories. See the problem, rule applied, and full worked solution with rendered steps.

HSF-IF.6

Riemann Sum Explorer

Approximate definite integrals with left, right, midpoint, and trapezoidal methods. Slider for number of rectangles shows convergence.

HSF-IF.7

Limits & Continuity Explorer

Compute left-hand, right-hand, and two-sided limits numerically. SVG graph, approach table, and discontinuity classification.

HSF-IF.4

Unit Circle Explorer

Explore the unit circle interactively. Drag a point to see trig values, exact forms, and geometric meanings for any angle.

HSF-TF.2, HSF-TF.3

Logarithm Explorer

Evaluate logs in any base, solve log equations, use change-of-base formula, and see the graph with its exponential inverse.

HSF-LE.4, HSF-IF.8

Calculus Labs

Investigation Labs for Math

Polynomial & Rational Functions Lab

Analyze polynomial roots, end behavior, and turning points. Explore rational functions with vertical, horizontal, and oblique asymptotes and holes.

HSA-APR.3, HSF-IF.7

Limits & Continuity Lab

Explore the formal epsilon-delta definition of limits, apply the squeeze theorem, and classify removable, jump, and infinite discontinuities.

HSF-IF.4

Derivatives & Tangent Lines Lab

Visualize derivatives as slopes of tangent lines, animate secant lines approaching tangents as h approaches 0, and explore derivative rules step by step.

HSF-IF.6

FTC & Net Change Lab

Explore the Fundamental Theorem of Calculus by building accumulation functions, evaluating definite integrals, and computing displacement vs total distance.

HSF-IF.7

Trigonometric & Polar Functions Lab

Explore sinusoidal parameters, inverse trig functions with domain restrictions, and polar curve classification including cardioids, roses, and limacons.

HSF-TF.5, HSF-TF.8

Statistics

Distributions, Inference & Regression

Cover CCSS HSS domains and AP Statistics: normal distributions, confidence intervals, hypothesis tests, and regression analysis.

Normal Distribution & Z-Score Explorer

Interactive bell curve with shaded probability regions. Convert between raw scores and Z-scores with numerical integration.

HSS-ID.4

Confidence Interval Calculator

Calculate confidence intervals for means and proportions. See margin of error, critical values, number line visualization, and sample size calculations.

HSS-IC.4

Hypothesis Testing Calculator

Run z-tests, t-tests, two-sample t-tests, and chi-square goodness-of-fit tests. See test statistics, p-values, critical values, and step-by-step breakdowns.

HSS-IC.5, HSS-IC.6

Linear Regression Calculator

Find the best-fit line for paired data. See slope, intercept, correlation, R-squared, scatter plot, and residual analysis.

HSS-ID.6, HSS-ID.7

Probability Distributions Explorer

Explore normal, binomial, Poisson, and uniform distributions. Visualize PDF/CDF plots, compute probabilities with draggable bounds, and find inverse values.

HSS-MD.1, HSS-MD.3

Normal Distribution Lab

Set a mean and standard deviation, adjust a raw score X, and see the Z-score, percentile, and shaded bell curve area update instantly. Explore the 68-95-99.7 rule.

HSS-ID.4

Hypothesis Testing Lab

Set up a one-sample z-test. Enter population mean, sample mean, standard deviation, and sample size. Compute the z-statistic, p-value, and decision.

HSS-IC.5

Regression & Residual Diagnostics Lab

Fit linear, quadratic, and exponential models then diagnose fit with residual plots, leverage, Cook's distance, and Q-Q plots.

HSS-ID.6

Biology

Cells, Genetics, Evolution & Ecology

Cover NGSS HS-LS standards and AP Biology topics: cell division, photosynthesis, cellular respiration, genetics, Hardy-Weinberg, and population ecology.

Genetics & Punnett Square Calculator

Generate Punnett squares for monohybrid, dihybrid, incomplete dominance, and sex-linked crosses. Color-coded SVG grid with genotype and phenotype ratios.

HS-LS3-2, HS-LS3-3

Cell Cycle / Mitosis-Meiosis Viewer

Step through every phase of mitosis and meiosis with SVG chromosome visualizations. Track chromosome number and compare both division types side by side.

HS-LS1-4

Photosynthesis Explorer

Explore photosynthesis rates under different light intensities, CO2 concentrations, and temperatures. See light response curves and limiting factors.

HS-LS1-5, HS-LS1-6

Cellular Respiration Explorer

Explore glycolysis, Krebs cycle, and electron transport chain. Compare aerobic vs anaerobic respiration and calculate ATP yields.

HS-LS1-7

Hardy-Weinberg Equilibrium Calculator

Calculate allele and genotype frequencies, test populations for HW equilibrium with chi-square, and simulate evolutionary forces over generations.

HS-LS4-2, HS-LS4-4

DNA/RNA Codon Translator

Transcribe DNA to mRNA and translate codons into amino acid chains. Color-coded nucleotides, codon brackets, amino acid pills, and full 64-codon table.

HS-LS1-1

Population Growth Simulator

Simulate exponential, logistic, and Lotka-Volterra predator-prey population models with carrying capacity, inflection points, and phase portraits.

HS-LS2-1, HS-LS2-2

Photosynthesis Lab

Investigate photosynthesis rates under different conditions. Discover limiting factors, find light compensation and saturation points, and measure net O2 production.

HS-LS1-5, HS-LS1-6

Cellular Respiration Lab

Measure CO2 production and O2 consumption under different conditions. Compare aerobic vs anaerobic respiration and calculate respiratory quotient.

HS-LS1-7

Mitosis & Meiosis Lab

Count cells in different mitotic phases to calculate mitotic index. Estimate phase durations from proportions and compare cell cycle timing.

HS-LS1-4

Hardy-Weinberg & Natural Selection Lab

Simulate allele frequency changes across generations under selection, drift, mutation, and migration. Test Hardy-Weinberg equilibrium with chi-square analysis.

HS-LS4-2, HS-LS4-4

Chemistry

Periodic Table, Reactions, Gases & Equilibrium

Cover NGSS HS-PS1 standards and AP Chemistry: element properties, stoichiometry, gas laws, acid-base chemistry, and equilibrium.

Periodic Table Explorer

Interactive periodic table with all 118 elements. Search by name or symbol, compare elements side-by-side, and view by category, electronegativity, or phase.

HS-PS1-1, HS-PS1-2

Balance Chemical Equations

Balance chemical equations by adjusting coefficients. Visual feedback with color-coded atom counts and step-by-step balancing guidance.

HS-PS1-7

Ideal Gas Law (PV=nRT) Calculator

Solve PV=nRT for any variable with unit support for pressure, volume, and temperature. Gas particle visualization and step-by-step math.

HS-PS2-6

pH, pOH & Acid-Base Calculator

Enter pH, pOH, [H+], or [OH-] to compute all four. Color-coded pH scale bar, acid/base classification, and step-by-step solutions.

HS-PS1-5

Molar Mass & Stoichiometry Calculator

Enter any chemical formula to compute molar mass, element breakdown with mass percentages, and step-by-step calculations.

HS-PS1-7

ICE / Q / K / Ksp Equilibrium Solver

Build ICE tables and solve for equilibrium concentrations, compare Q to K, calculate molar solubility from Ksp, and solve weak acid/base Ka or Kb for pH.

HS-PS1-6

Electron Configuration Generator

Look up any of the 118 elements to see full electron configuration, noble gas shorthand, orbital box diagram, valence electrons, and oxidation states.

HS-PS1-1

Gas Laws Lab

Explore Boyle's, Charles's, and Gay-Lussac's gas laws with animated particles. Adjust pressure, volume, and temperature to discover relationships experimentally.

HS-PS2-6

Chemical Kinetics Lab

Simulate reaction rates with the Arrhenius equation. Adjust concentration, temperature, and catalysts to observe how collision frequency and rate constants change.

HS-PS1-5

Titration Lab

Simulate acid-base titration with a virtual burette. Watch pH curves develop in real time, find equivalence points, and compare strong and weak acid behavior.

HS-PS1-5

Calorimetry Lab

Mix substances at different temperatures and observe heat exchange over time. Calculate specific heat, compare calorimeters, and model heat loss.

HS-PS3-1

Physics

Kinematics, Forces, Energy, Waves & Electricity

Cover NGSS HS-PS standards and AP Physics 1/2/C: kinematics, Newton's laws, energy conservation, wave behavior, circuits, and electric fields.

Kinematics Solver

Solve constant-acceleration problems with step-by-step solutions and motion graphs.

HS-PS2-1

Forces & Free-Body Diagram Tool

Explore Newton's second law with interactive free-body diagrams on surfaces, inclines, and more.

HS-PS2-1, HS-PS2-2

Projectile Motion Calculator

Calculate trajectory, range, max height, and time of flight for projectile motion. Visualize the parabolic path with an interactive time slider.

HS-PS2-1

Energy Conservation Explorer

Track kinetic, potential, and spring energy as an object moves along ramps, roller coasters, and spring systems.

HS-PS3-1, HS-PS3-2

Wave Explorer

Visualize transverse waves, superposition, interference, and standing waves.

HS-PS4-1, HS-PS4-3

Circuit Calculator

Calculate voltage, current, resistance, and power with Ohm's law. Build series and parallel resistor networks with step-by-step equivalent resistance.

HS-PS2-5

Electric Field Visualizer

Place positive and negative charges on a canvas. See electric field arrows, field lines, and potential color maps update in real time.

HS-PS3-5

Specific Heat & Calorimetry Calculator

Solve Q=mcT for any variable or find the equilibrium temperature when mixing two substances. Step-by-step thermal energy math.

HS-PS3-1

Thermodynamics Lab

Build PV diagrams with isothermal, adiabatic, isobaric, and isochoric processes. Calculate work as area under the curve and explore Carnot cycle efficiency.

HS-PS3-1

Circuit Builder Lab

Explore series, parallel, and combination circuits with adjustable resistor values. Verify Ohm's law and Kirchhoff's laws with animated current flow.

HS-PS2-5

Standing Waves Lab

Visualize standing wave patterns on strings and in pipes. Adjust tension, length, and harmonic number to explore nodes, antinodes, and resonance frequencies.

HS-PS4-1

Momentum & Impulse Lab

Apply variable forces over time and see real-time force-time curves. Calculate impulse as area under the curve and compare to momentum change.

HS-PS2-2

Earth Science

Plate Tectonics, Climate & Stars

Cover NGSS HS-ESS standards: plate tectonics, Earth history, climate change, and stellar evolution.

Plate Tectonics Explorer

Explore plate boundary types, the rock cycle, radiometric dating, and Earth's internal layers. View cross-sections of divergent, convergent, and transform boundaries.

HS-ESS2-1, HS-ESS2-3

Carbon Footprint Calculator

Estimate annual CO2 emissions from transportation, home energy, diet, and lifestyle. Pie chart breakdown, country comparison, and trees-to-offset metrics.

HS-ESS3-1, HS-ESS3-4

Star Lifecycle Visualizer

Interactive HR diagram with 23 real stars, stellar evolution pathways from nebula to end state, and a star properties calculator.

HS-ESS1-2, HS-ESS1-3

Greenhouse Effect & Climate Lab

Investigate Earth's energy budget and greenhouse effect. Adjust CO2 levels and albedo, measure temperature response, and compare emission scenarios.

HS-ESS2-4, HS-ESS3-5

Earth History Lab

Calculate rock ages using radiometric dating with multiple isotope systems. Measure plate motion rates from magnetic reversal distances.

HS-ESS1-5, HS-ESS2-1

Computer Science

Algorithms, Data Structures & Security

Cover AP CSA and AP CSP topics: sorting and searching algorithms, complexity analysis, data structures, cryptography, and recursion.

Sorting Algorithm Visualizer

Watch bubble, selection, insertion, merge, and quick sort in action with color-coded bars for comparisons, swaps, and sorted elements.

CSTA 3A-AP-13

Big-O Complexity Visualizer

Compare O(1), O(log n), O(n), O(n log n), O(n squared), O(n cubed), and O(2 to the n) on an interactive graph. See operation counts at any input size.

CSTA 3A-AP-22

Data Structure Visualizer

Visualize stacks, queues, linked lists, binary search trees, and min heaps with animated operations. Push, pop, insert, delete, and traverse step by step.

CSTA 3A-AP-14

Cryptography Explorer

Encrypt and decrypt messages with Caesar, substitution, Vigenere, XOR, and simplified RSA ciphers. Visualize frequency analysis and brute force attacks.

CSTA 3A-NI-07

Recursion & Call Stack Visualizer

Step through recursive function execution with animated call stack frames and recursion trees. Visualize factorial, fibonacci, merge sort, and binary search.

CSTA 3A-AP-17

Searching & Sorting Performance Lab

Compare linear search, binary search, selection sort, insertion sort, and merge sort side by side. Collect performance data across array sizes and verify complexity.

CSTA 3A-AP-13

Cybersecurity Lab

Crack ciphers by brute force, measure password entropy, and explore the avalanche effect in hash functions. Collect data on how key length affects encryption security.

CSTA 3A-NI-07

Graph Theory & Networks Lab

Build graphs interactively, run BFS and DFS traversals, find shortest paths with Dijkstra, and compute minimum spanning trees with Kruskal.

CSTA 3A-AP-13

Standards Covered

  • CCSS HSA/HSF/HSS: Algebra, functions, and statistics domains for Grades 9-12
  • NGSS HS-PS/LS/ESS: Physics, life science, and earth science performance expectations
  • AP Courses: Physics 1/2/C, Chemistry, Biology, Statistics, Calculus AB/BC, CSA, CSP
  • CSTA: 9-12 computer science standards for algorithms, data, and security

Mission Packs

Curated sets of tools and labs organized around a theme. Great for units, AP exam prep, or project-based learning.

Forces & Motion Cell Biology Genetics & Evolution Chemistry Fundamentals Chemical Reactions Algebra Essentials Calculus Core AP Statistics

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