For Ages 7 to 9

Grades 2-3 Tools & Labs

21 interactive tools plus 8 investigation labs for Grades 2 and 3. Place value, multiplication, fractions, measurement, life cycles, weather, forces, and early computer science. Everything runs free in the browser with no downloads or accounts required.

21 tools 8 labs CCSS & NGSS aligned
Math Tools Math Labs Science Tools Science Labs Computer Science

Math Tools

Numbers, Fractions & Measurement

Build fluency with place value, multiplication, division, fractions, telling time, money, and measurement - the core CCSS 2nd and 3rd grade math standards.

Place Value Explorer

See any number broken into place values with base-10 blocks, expanded form, and word form. Supports decimals.

2.NBT.1, 2.NBT.3

Addition & Subtraction Strategies Explorer

Explore addition and subtraction with base-10 blocks, number line hops, and the column method. Visualize regrouping and borrowing for numbers up to 999.

2.OA.1, 2.NBT.7

Multiplication Arrays & Equal Groups Builder

Explore multiplication with arrays, equal groups, skip counting, and fact families. Visual models for times tables from 1x1 to 12x12.

3.OA.1, 3.OA.3

Division as Sharing & Grouping Explorer

Explore division through equal sharing and equal grouping models with visual animations, remainder highlighting, and inverse multiplication connections.

3.OA.2, 3.OA.6

Fraction Wall & Equivalent Fractions Builder

Interactive fraction wall showing halves through twelfths. Click pieces to find equivalents, compare fractions visually, and simplify with GCD.

3.NF.1, 3.NF.3

Fractions on a Number Line

Place, compare, and find equivalent fractions on an interactive number line. Visualize unit fractions, mixed numbers, and fraction comparison.

3.NF.2, 3.NF.3

Telling Time & Elapsed Time Clock

Interactive analog and digital clock for learning to tell time, with quarter-hour labels, AM/PM, elapsed time calculator, and schedule puzzles.

2.MD.7, 3.MD.1

Money Counter & Change Maker

Click coins and bills to count money, practice making change, and compare prices. Interactive US currency tool for elementary students.

2.MD.8

Measurement Lab for Kids

Virtual ruler, graduated cylinder, and balance scale for practicing measurement. Convert between inches/cm, mL/cups, and grams/kg with visual comparisons.

2.MD.1, 3.MD.2

Rounding & Estimation Explorer

Round numbers to the nearest 10, 100, or 1000 on an interactive number line. Practice front-end estimation and check if answers are reasonable.

3.NBT.1, 3.OA.8

Math Labs

Investigation Labs for Math

Structured lab investigations with data tables and guided experiment prompts to reinforce place value, fractions, and number operations.

Place Value, Decimals & Scientific Notation Lab

Decompose numbers into place values with a color-coded chart. Convert between decimals, fractions, and percents.

2.NBT.1, 2.NBT.3

Fraction Operations & Equivalents Lab

Explore fraction arithmetic with visual fraction bars. Add, subtract, multiply, and divide fractions and mixed numbers step by step.

3.NF.1, 3.NF.3

Integer Operations & Absolute Value Lab

Visualize integer addition and subtraction on a number line with directional arrows. Discover sign rules for multiplication and division.

3.OA.5, 3.OA.7

Science Tools

Life Cycles, Weather, Forces & Materials

Earth science, life science, and physical science tools built around the NGSS Grade 2 and 3 performance expectations.

Life Cycles Explorer

Explore life cycles of butterflies, frogs, flowering plants, and dogs with animated cycle wheels, drag-to-order practice, and side-by-side comparison mode.

3-LS1-1

Plant Needs & Growth Explorer

Set light, water, soil, and temperature conditions to grow virtual bean, sunflower, or grass plants. Compare two plants side by side.

2-LS2-1, 3-LS1-1

Habitats & Adaptations Builder

Match 18 animals to 6 habitats. Explore each animal's adaptations and discover what happens when habitats change.

2-LS4-1, 3-LS4-3

States of Matter Playground

Watch particles change behavior as temperature changes. See solids melt to liquids and boil to gases with animated particles and heating curves.

2-PS1-1, 2-PS1-4

Pushes, Pulls & Motion Playground

Push objects across different surfaces to see how force and friction affect motion. Explore balanced and unbalanced forces.

3-PS2-1, 3-PS2-2

Weather & Water Cycle Explorer

Explore the water cycle with an animated diagram, predict weather from temperature and humidity, identify cloud types, and compare seasonal patterns.

2-ESS2-3, 3-ESS2-1

Sun, Shadows & Daylight Explorer

Watch shadows change length and direction as the sun moves across the sky. Compare daylight hours across seasons with shadow quiz challenges.

3-ESS1-1

Materials Sorter & Properties Explorer

Sort 16 common materials by properties like hard/soft, transparent/opaque, and conductor/insulator with Venn diagram mode.

2-PS1-1, 2-PS1-2

Science Labs

Investigation Labs for Science

Record observations, run guided experiments, and export lab reports for life, earth, and physical science topics.

Plant Growth Variables Lab

Control sunlight, water, soil type, and temperature to grow a virtual plant over 30 days. Change one variable at a time and record height.

2-LS2-1, 3-LS1-1

Sink or Float Lab

Predict whether 12 everyday objects will sink or float, then test them in a virtual water tank. Discover how density determines buoyancy.

2-PS1-1, 2-PS1-2

Shadow Length Lab

Explore how shadow length changes throughout the day. Adjust the time of day and object height to see the SVG shadow update live.

3-ESS1-1

Soil Absorption Lab

Pour water on five soil types and measure how much is absorbed versus runs off. Investigate permeability, drainage, and the water cycle.

2-ESS2-1, 2-ESS2-3

Simple Weather Station Lab

Log daily weather observations over two simulated weeks. Record temperature, cloud cover, wind, and precipitation, then identify patterns.

3-ESS2-1, 3-ESS2-2

Computer Science

Sequences, Loops & Decisions

Introduce algorithmic thinking with sequencing, loops, and conditionals. No syntax required - drag tiles and see the logic run.

Robot Directions & Sequencing

Guide a robot through a grid by building step-by-step sequences of commands. Learn how computers follow precise instructions.

CSTA 2-AP-10

Loops & Pattern Coder

Build repeat loops to create color tile patterns. Discover how loops let computers do the same action many times without repeating the same step.

CSTA 2-AP-11

If/Then Choice Builder

Build IF/THEN/ELSE rules and watch animated characters respond to changing conditions. Learn how programs make decisions.

CSTA 2-AP-12

Standards Covered

  • CCSS Math 2: 2.NBT (place value), 2.OA (operations), 2.MD (measurement and data)
  • CCSS Math 3: 3.OA (multiplication and division), 3.NF (fractions), 3.MD (area and perimeter)
  • NGSS Grade 2: 2-LS4 (biodiversity), 2-PS1 (matter), 2-ESS2 (earth systems)
  • NGSS Grade 3: 3-LS1 (life cycles), 3-PS2 (forces), 3-ESS1 (weather patterns)

Mission Packs

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

Fractions Multiplication & Division

Looking for More?

Browse the full catalog of free interactive tools and virtual labs across every grade band and subject.

All Tools All Labs Standards Hubs