Science
Explore the world around you.
Start with an adventure inside the human body, then explore plants, animals, weather, light, sound, forces, matter, Earth and space. Every course has short lessons, hands-on interactive experiments and quizzes.
- Grades 1–6
- 55 courses
- 2 free per grade
Science by Grade
Every grade has its own path. Courses marked Free are open with a free account.
Course 1Human Body AdventureExplore your heart, lungs, brain, teeth, skin and more!- Course 2Living & Non-LivingFind out what makes something alive, what living things need and how they grow.
- Course 3Animals & Their HomesWhere animals live, how their bodies help them, and how they grow.
- Course 4How Plants GrowPlant parts, what plants need and how a seed becomes a plant.
- Course 5Weather WatchSunny, rainy, windy or snowy: watch the weather and measure it.
- Course 6Day & Night SkyThe sun, the moon and the stars, and why we have day and night.
- Course 7Light & ShadowsHow light travels, what it shines through and how shadows are made.
- Course 8Sound & VibrationsLoud and soft, high and low: how sounds are made.
- Course 9Push & PullPushes and pulls make things move, speed up and roll down ramps.
- Course 10Materials Around UsWood, metal, plastic and more: what things are made of and what they can do.
- Course 1Human Body AdventureExplore your heart, lungs, brain, teeth, skin and more!
- Course 2Solids, Liquids & GasesEverything is matter: solid, liquid or gas. Find out how each one behaves.
- Course 3Animal Life CyclesFrom egg to butterfly, from tadpole to frog: how animals grow up.
- Course 4Habitats of the WorldForests, deserts, oceans and polar lands, and the animals that live there.
- Course 5Rocks & SoilDifferent rocks, kinds of soil and the layers under our feet.
- Course 6Water on EarthOceans, rivers and lakes: where water is and how to save it.
- Course 7Melting & FreezingHeating and cooling change matter. Some changes can be undone and some can't.
- Course 8Magnet MagicWhat magnets pull, how their poles push and pull, and how far their force reaches.
- Course 9Pollinators & SeedsHow bees help flowers make seeds, and how seeds travel to new places.
- Course 10Wind & Water Shape the LandHow wind and water move rocks and soil and change the land.
- Course 1Human Body AdventureExplore your heart, lungs, brain, teeth, skin and more!
- Course 2Forces & MotionBalanced and unbalanced forces, friction and how mass changes motion.
- Course 3Static & MagnetismStatic electricity, compasses and making a magnet with electricity.
- Course 4Weather & ClimateWeather tools, rainfall patterns and the climate zones of the world.
- Course 5Traits & Life CyclesWhat we inherit from parents, what we learn, and how living things grow.
- Course 6Fossils & Ancient LifeHow fossils form, extinct animals and what rock layers tell us.
- Course 7Ecosystems & Food ChainsFood chains, producers, consumers and decomposers.
- Course 8Simple MachinesLevers, pulleys and ramps help us lift and move things with less force.
- Course 9The Water CycleEvaporation, condensation and precipitation: water's endless journey.
- Course 10Animal AdaptationsBody parts and behaviors that help animals survive.
- Course 1Human Body AdventureExplore your heart, lungs, brain, teeth, skin and more!
- Course 2Energy & MotionStored and moving energy, speed, collisions and how energy is transferred.
- Course 3Electricity & CircuitsConductors and insulators, complete circuits and making bulbs brighter.
- Course 4Light & How We SeeHow light reaches our eyes, what it passes through and why colors feel warm.
- Course 5Sound WavesPitch, echoes and how bats hunt with sound.
- Course 6Earth's Changing SurfaceWeathering, erosion and deposition shape mountains, valleys and deltas.
- Course 7Rocks & MineralsIgneous, sedimentary and metamorphic rocks, the rock cycle and mineral hardness.
- Course 8Plant & Animal StructuresThe parts of plants and animals and the jobs they do.
- Course 9Energy ResourcesRenewable and non-renewable energy, solar panels and wind turbines.
- Course 10Earthquakes & VolcanoesEarth's layers, earthquake-safe buildings and how volcanoes erupt.
- Course 1Human Body AdventureExplore your heart, lungs, brain, teeth, skin and more!
- Course 2Properties of MatterParticles, measuring matter and why some things float on others.
- Course 3Mixtures & SolutionsMixtures, dissolving and clever ways to separate things.
- Course 4Physical & Chemical ChangesChanges that make new substances and changes that don't.
- Course 5GravityWeight on other worlds, air resistance and gravity in space.
- Course 6The Solar SystemThe Sun, rocky planets, giant planets and how long their years are.
- Course 7Sun, Earth & MoonSeasons, Moon phases and eclipses.
- Course 8Food Webs & EnergyHerbivores, carnivores, omnivores, the energy pyramid and balance in nature.
- Course 9Earth's SystemsLand, water, air and life, and how they work together.
- Course 10Protecting Our WaterHow little fresh water we have, how we clean it and how to save it.
- Course 1Human Body AdventureExplore your heart, lungs, brain, teeth, skin and more!
- Course 2Cells: Building Blocks of LifePlant and animal cells, how cells build a body and how water crosses cell membranes.
- Course 3Atoms & MoleculesElements, compounds, metals and how chemical reactions rearrange atoms.
- Course 4Heat TransferConduction, convection and radiation, conductors and insulators.
- Course 5Waves: Light & SoundTypes of waves, the electromagnetic spectrum and the colors of light.
- Course 6Air Pressure & WeatherAir pressure, weather fronts and how thunderstorms form.
- Course 7Plate TectonicsMoving plates, plate boundaries and the supercontinent Pangaea.
- Course 8Genetics & HeredityDNA, genes, dominant and recessive traits and Punnett squares.
- Course 9Biodiversity & ConservationClassifying life, where biodiversity is richest and how we protect species.
- Course 10Newton's Laws of MotionInertia, force and acceleration, and action and reaction.