Simulator
Change the inputs and watch a system respond.
57 tools
Perspective Camera
Switch a camera between first, second and third person on the same scene and see what the narrator can and...
Grade 7 · English Language Arts · SimulatorSetting Swap
Move a story to a different time or place and see which plot events and character choices break.
Grade 8 · English Language Arts · SimulatorVoice Switcher
Flip sentences between active and passive voice and see who gets the blame in news headlines.
Grade 10 · English Language Arts · SimulatorTone Dial
Rewrite the same paragraph by turning a tone dial (ominous, playful, bitter) and see how word choices change.
Grade 11 · English Language Arts · SimulatorRhetorical Situation Simulator
Change speaker, audience and purpose for a speech and see which rhetorical choices work.
Grades 9-12 · English Learners · SimulatorInbox Simulator
Respond to realistic school and job emails; a register meter shows formal vs casual tone.
Grades 3-5 · Health and PE · SimulatorGerm Spread Sim
See how germs spread in a classroom and how handwashing and covering coughs change the outbreak.
Grades 9-12 · Computer Science · SimulatorSorting Showdown
Visualize and race sorting algorithms on different data sets; compare efficiency.
Grades 9-12 · Careers and Finance · SimulatorCompound Interest Garden
Plant savings and watch them grow with compound interest over decades.
Grades 9-12 · Careers and Finance · SimulatorMarket Time Machine
Invest across asset types using historical index data; learn about risk, diversification and time....
Grade 1 · Math · SimulatorElevator Hundred
An elevator moves up by tens and floors by ones in a hundred-chart building; ride it to solve sums.
Grade 3 · Math · SimulatorRoller Coaster Rounding
A coaster car rolls to the nearest ten or hundred hill; see why 45 rolls up.
Grade 4 · Math · SimulatorGrowth Spurt
Compare animals and plants: "times as tall" vs "taller by." Sliders show the difference between additive...
Grade 4 · Math · SimulatorMoney and Meters
Tenths and hundredths shown three ways: dimes and pennies, meter sticks, and grids. Change one and the...
Grade 5 · Math · SimulatorTwo Rule Race
Two snails follow different rules; plot their positions and see their relationship on the coordinate grid.
Grade 5 · Math · SimulatorShrink Ray
Multiply by a fraction and the shrink ray scales the picture; multiply by more than one and it grows.
Grade 7 · Math · SimulatorHot Air and Sandbags
Add hot air (positives) and sandbags (negatives) to a balloon; removing a sandbag goes up. Signed rules...
Grade 7 · Math · SimulatorJellybean Jar
Draw random samples from a giant jar to estimate the color mix; bigger samples get closer to the truth.
Grade 7 · Math · SimulatorCarnival Odds
Spin wheels and roll dice thousands of times; compare theoretical odds to the experiment. Are the carnival...
Grade 8 · Math · SimulatorTwo Trains
Two trains, two equations, one graph; drag speeds and start times to see where (and if) they meet.
Grade 9 · Math · SimulatorLaunch Pad
Launch a projectile and see its quadratic; the roots are where it lands. Solve to aim for targets.
Grade 10 · Math · SimulatorMedical Test Paradox
Run a population through a disease test; conditional probability shows why a positive result isn't the whole story.
Grade 11 · Math · SimulatorOutbreak Model
Model a spreading rumor or virus; logarithms answer "when will it reach 1 million?"
Grade 11 · Math · SimulatorFerris Wheel
Ride a Ferris wheel and watch height trace a sine wave; change radius and speed to change the graph.
Grade 12 · Math · SimulatorFlight Planner
Fly a plane through crosswinds; add velocity vectors to land on the runway.
Grade 12 · Math · SimulatorGame Show Strategist
Simulate game show choices (Monty Hall and friends); expected value says when to switch.
Grade 12 · Math · SimulatorSample Machine
Draw thousands of samples and watch a sampling distribution form; the Central Limit Theorem appears on its own.
Grade 12 · Math · SimulatorSpeedometer
Drive a car along a position graph; the speedometer is the derivative, drawn live.
Grade 12 · Math · SimulatorRain Gauge
Rainfall rate over a day fills a tank; Riemann rectangles approximate the total as they get thinner.
Kindergarten · Science · SimulatorBeaver Builders
Help a beaver build a dam and watch the stream change into a pond; then help people reduce their own footprint.
Grade 3 · Science · SimulatorTug of War Arena
Add teams to a tug of war; balanced forces hold still, unbalanced ones win. Predict the pattern of motion.
Grade 3 · Science · SimulatorWolf Pack Survival
Choose whether animals hunt alone or in groups; see survival rates change for wolves, fish schools and bee...
Grade 4 · Science · SimulatorErosion Table
A sand table with water, wind and ice controls; carve canyons, deltas and arches over fast-forwarded time.
Grade 5 · Science · SimulatorFood Web Jenga
Build a food web, then remove a species and watch the web wobble or collapse.
Grade 6 · Science · SimulatorMoon Phase Model
Orbit the Moon around Earth and watch phases and eclipses from both a space and a backyard view.
Grade 6 · Science · SimulatorOcean Conveyor
Change heating and Earth's spin to see winds and ocean currents form, then see how they shape coastal climates.
Grade 7 · Science · SimulatorParticle Party
Heat and cool particles and watch them shift between solid, liquid and gas; the temperature graph explains...
Grade 7 · Science · SimulatorPredator-Prey Island
Wolves and moose on an island; set starting numbers and watch population cycles unfold.
Grade 8 · Science · SimulatorSkate Park Energy
A skater on a ramp you design; watch kinetic and potential energy trade places in a live bar chart.
Grade 8 · Science · SimulatorGene Pool
Breed fantasy creatures and track how genes and mutations pass on; compare sexual and asexual reproduction.
Grade 9 · Science · SimulatorBody Thermostat
Keep a body at 37 C through exercise, cold and fever; feedback loops kick in automatically.
Grade 9 · Science · SimulatorPunnett Predictor
Cross parents and compare Punnett predictions to 1,000 simulated offspring; probability made visible.
Grade 9 · Science · SimulatorCarrying Capacity
Grow a deer population with limited food and predators; see logistic growth level off.
Grade 9 · Science · SimulatorOrbit Lab
Change mass and speed to explore Kepler's laws with real planet data.
Grade 10 · Science · SimulatorEquilibrium Seesaw
Stress a reaction with heat, pressure and concentration; watch it shift back (Le Chatelier).
Grade 10 · Science · SimulatorHalf-Life Dice
Roll thousands of atom dice to see half-life; date ancient artifacts with carbon-14.
Grade 11 · Science · SimulatorSpace Cargo
Push cargo in zero-g, on ice and on carpet; F = ma becomes a game of precision.
Grade 4 · Social Studies · SimulatorSettle the Valley
Settle a valley: build farms, dams and roads and see how the land and people change each other.
Grade 6 · Social Studies · SimulatorHunter to Farmer
Choose to forage or farm across seasons; see how farming changes population, villages and work.
Grade 7 · Social Studies · SimulatorConstantinople Defense
Defend Constantinople across centuries; walls, trade and diplomacy explain how Byzantium lasted.
Grade 7 · Social Studies · SimulatorPrinting Press
Print and spread pamphlets; watch how fast ideas travel compared to handwritten copies.
Grade 9 · Social Studies · SimulatorAlliance Web
Pull one thread in Europe's alliance system and watch the whole web pull nations into war.
Grade 10 · Social Studies · SimulatorInflation Wallet
Buy bread in 1923 Germany as prices double; see how crisis opened the door to extremism.
Grade 11 · Social Studies · SimulatorStock Market 1929
Trade stocks on margin in 1929; experience the crash and the New Deal response.
Grade 12 · Social Studies · SimulatorConcert Ticket Market
Set ticket prices; see supply and demand curves, shortages and scalpers emerge.
Grade 12 · Social Studies · SimulatorFed Chair
Set interest rates and see inflation and unemployment respond over time.
Grade 12 · Social Studies · SimulatorConformity Experiments
Walk through classic experiments (Asch, bystander effect) and discuss ethics; mental health topics link to...