Explore science by doing it.

Chemistry

Acid-Base Solutions

Compare strong and weak acids and bases in solution.

Math

Area Builder

Build shapes to explore area and perimeter.

Math

Area Model Algebra

Multiply polynomials using an area model.

Math

Area Model Decimals

Multiply decimals using area models.

Math

Area Model Introduction

Build an understanding of multiplication with simple area models.

Math

Area Model Multiplication

Use area models to multiply multi-digit numbers.

Math

Arithmetic

Practice multiplication, division and factoring in game form.

Chemistry

Atomic Interactions

Explore the forces and potential energy between atoms.

Physics

Balancing Act

Place masses on a seesaw to explore torque and balance.

Chemistry

Balancing Chemical Equations

Balance chemical equations by adjusting coefficients.

Includes a 3-step quick start

Physics

Balloons and Static Electricity

Rub a balloon to explore static charge and attraction.

Chemistry

Beer's Law Lab

Measure how concentration and light change a solution's absorbance.

Physics

Bending Light

Explore refraction and reflection as light moves between materials.

Physics

Blackbody Spectrum

See how an object's temperature changes the light it emits.

Math

Build a Fraction

Build fractions from shapes and numbers to match targets.

Chemistry

Build a Molecule

Combine atoms to build molecules and learn chemical formulas.

Physics

Build a Nucleus

Add protons and neutrons to build nuclei and see which ones are stable.

Chemistry

Build an Atom

Add protons, neutrons and electrons to build atoms and ions.

Physics

Buoyancy

Measure buoyant force and displaced fluid to explain why objects float or sink.

Physics

Buoyancy: Basics

See why objects float or sink by comparing their density with the liquid's.

Math

Calculus Grapher

Draw a function and see its derivative and integral update together.

Physics

Capacitor Lab: Basics

Explore how plate size and separation change a capacitor's charge.

Math

Center and Variability

Explore mean, median, range and spread using data from kicked balls.

Physics

Charges and Fields

Place charges and map the electric field and voltage around them.

Physics

Circuit Construction Kit: AC

Build AC circuits with capacitors, inductors and resistors and measure current and voltage.

Physics

Circuit Construction Kit: AC - Virtual Lab

A lab-style version of the AC circuit kit for open-ended experiments.

Physics

Circuit Construction Kit: DC

Build circuits with batteries, bulbs and resistors and measure current and voltage.

Includes a 3-step quick start

Physics

Circuit Construction Kit: DC - Virtual Lab

A lab-style version of the DC circuit kit for open-ended experiments.

Physics

Collision Lab

Collide balls and track momentum and kinetic energy before and after.

Biology

Color Vision

Mix colored light and filters to see how we perceive color.

Chemistry

Concentration

Add solute and water to explore concentration and saturation.

Physics

Coulomb's Law

Measure the electric force between two charges.

Math

Curve Fitting

Fit linear and polynomial curves to data and judge the fit.

Physics

Density

Compare the mass and volume of blocks to explore density.

Chemistry

Diffusion

Watch particles spread out and explore what controls the rate of diffusion.

Physics

Energy Forms and Changes

Follow energy as it changes form between sources, converters and users.

Physics

Energy Skate Park

Track a skater's kinetic, potential and thermal energy on custom tracks.

Includes a 3-step quick start

Physics

Energy Skate Park: Basics

Track a skater's kinetic and potential energy on a ramp.

Math

Equality Explorer

Solve equations by keeping both sides of a balance equal.

Math

Equality Explorer: Basics

Use a balance scale to explore equality.

Math

Equality Explorer: Two Variables

Balance equations with two variables using a scale.

Math

Expression Exchange

Combine like terms and simplify algebraic expressions.

Physics

Faraday's Electromagnetic Lab

Explore magnets, coils, transformers and generators in one electromagnetism lab.

Physics

Faraday's Law

Move a magnet through a coil to induce a current.

Physics

Forces and Motion: Basics

Push, pull and apply forces to explore net force and motion.

Includes a 3-step quick start

Physics

Fourier: Making Waves

Add sine waves together to build complex waveforms.

Math

Fraction Matcher

Match fractions written as numbers and as shapes.

Math

Fractions: Equality

Find equivalent fractions using shapes and number lines.

Math

Fractions: Intro

Represent fractions with shapes and number lines.

Math

Fractions: Mixed Numbers

Build and match mixed numbers and improper fractions.

Physics

Friction

Rub two surfaces together and watch atoms heat up from friction.

Math

Function Builder

Build and test functions, and connect inputs, outputs and equations.

Math

Function Builder: Basics

Send shapes through functions and figure out the rules.

Chemistry

Gas Properties

Investigate the gas laws and the kinetic theory of gases.

Chemistry

Gases Intro

Pump gas into a box and explore how pressure, volume and temperature relate.

Biology

Gene Expression Essentials

Follow how a cell turns a gene into a protein.

Physics

Generator

Spin a magnet near a coil to generate electricity and light a bulb.

Physics

Geometric Optics

Trace light rays through lenses and mirrors to find where images form.

Physics

Geometric Optics: Basics

Explore how lenses and mirrors form images.

Math

Graphing Lines

Explore slope and the equations of lines on a graph.

Includes a 3-step quick start

Math

Graphing Quadratics

Explore how coefficients change a parabola's shape and position.

Math

Graphing Slope-Intercept

Graph lines in slope-intercept form and see how slope and intercept change them.

Physics

Gravity and Orbits

Change masses and distances to see how gravity controls orbits.

Includes a 3-step quick start

Physics

Gravity Force Lab

Measure the gravitational force between two masses.

Physics

Gravity Force Lab: Basics

See how mass and distance change the gravitational force between two objects.

Physics

Greenhouse Effect

See how greenhouse gases trap energy and change Earth's temperature.

Physics

Hooke's Law

Stretch and compress springs to explore force, displacement and the spring constant.

Chemistry

Isotopes and Atomic Mass

Build isotopes and see how they set an element's average atomic mass.

Physics

John Travoltage

Build up static charge and watch it discharge as a spark.

Physics

Kepler's Laws

Explore how planets orbit the Sun and test Kepler's three laws.

Math

Least-Squares Regression

Fit a line to data and explore residuals and correlation.

Physics

Magnet and Compass

Move a magnet and watch compass needles reveal its magnetic field.

Physics

Magnets and Electromagnets

Compare a bar magnet with an electromagnet and explore their magnetic fields.

Math

Make a Ten

Add numbers by making tens.

Physics

Masses and Springs

Explore springs, oscillation and energy with adjustable masses and damping.

Physics

Masses and Springs: Basics

Hang masses on springs to explore stretch, oscillation and spring stiffness.

Math

Mean: Share and Balance

Share and level out quantities to build an intuitive understanding of the mean.

Biology

Membrane Transport

Explore how particles move across a cell membrane through channels and transport proteins.

Physics

Models of the Hydrogen Atom

Compare historical models of the hydrogen atom with what experiments actually show.

Chemistry

Molarity

Change solute amount and volume to explore molarity.

Chemistry

Molecule Polarity

Change electronegativity to see how bonds and molecules become polar.

Chemistry

Molecule Shapes

Build molecules in 3D and explore their geometry and bond angles.

Chemistry

Molecule Shapes: Basics

Explore molecule geometry with simple 3D models.

Chemistry

Molecules and Light

See how different kinds of light interact with molecules.

Physics

My Solar System

Build your own system of bodies and watch how gravity shapes their orbits.

Biology

Natural Selection

Add mutations and environmental pressures to see how a population evolves.

Includes a 3-step quick start

Biology

Neuron

Stimulate a neuron and watch an action potential travel along the axon.

Physics

Normal Modes

Explore how connected masses vibrate in normal modes.

Math

Number Compare

Compare two quantities to decide which is greater, less or equal.

Math

Number Line: Distance

Find the distance between points on a number line.

Math

Number Line: Integers

Place and compare positive and negative integers on a number line.

Math

Number Line: Operations

Add and subtract on a number line, including negative numbers.

Math

Number Pairs

Find pairs of numbers that make a total to build addition and number sense.

Math

Number Play

Count, group and represent numbers in different ways.

Physics

Ohm's Law

See how voltage and resistance determine current.

Includes a 3-step quick start

Physics

Pendulum Lab

Explore how length, mass and gravity affect a pendulum's period.

Includes a 3-step quick start

Chemistry

pH Scale

Explore pH, concentration and ions in solutions.

Includes a 3-step quick start

Chemistry

pH Scale: Basics

Test everyday liquids and see how dilution changes pH.

Math

Plinko Probability

Drop balls through a peg board to explore probability and distributions.

Math

Projectile Data Lab

Collect launch data and analyze it with histograms, center and spread.

Physics

Projectile Motion

Launch objects and see how angle and speed change the path.

Includes a 3-step quick start

Math

Projectile Sampling Distributions

Launch many projectiles to see how sample means form a sampling distribution.

Math

Proportion Playground

Explore ratios and proportions with necklaces, paint mixes and more.

Math

Quadrilateral

Reshape a quadrilateral and discover the properties that define each type.

Physics

Quantum Coin Toss

Compare classical and quantum coin flips to see how probability and measurement outcomes work.

Physics

Quantum Measurement

Investigate how measuring a quantum system affects its state and the results you observe.

Math

Ratio and Proportion

Move hands to match ratios and build a feel for proportional reasoning.

Chemistry

Reactants, Products and Leftovers

Explore limiting reactants with sandwiches and chemical reactions.

Physics

Resistance in a Wire

Change a wire's length, area and resistivity to see how resistance changes.

Physics

Rutherford Scattering

Fire alpha particles at atoms to discover the nucleus.

Physics

Sound Waves

See and hear how frequency and amplitude change a sound wave.

Chemistry

States of Matter

Explore phase changes, phase diagrams and atomic interactions.

Chemistry

States of Matter: Basics

Heat and cool atoms to see solids, liquids and gases.

Math

Trig Tour

Move around the unit circle to connect angles with sine, cosine and tangent.

Physics

Under Pressure

Explore how depth, fluid density and gravity change pressure.

Math

Unit Rates

Shop and race to explore unit rates and double number lines.

Physics

Vector Addition

Add vectors graphically and by components.

Physics

Vector Addition: Equations

Add and scale vectors and connect the picture to vector equations.

Physics

Wave Interference

Make waves interfere and explore patterns from slits and multiple sources.

Physics

Wave on a String

Wiggle a string to explore amplitude, frequency, damping and tension.

Physics

Waves Intro

Explore water, sound and light waves and what they have in common.