Word Problem Playground
Word Problem Playground See the story.
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Upper elementary (9–11)
108 appsWave Lab
Wave Lab Physics · Waves Wave Lab Stretch a rope, shake it, and watch a wave race along it.
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Water Cycle Adventure
Water Cycle Adventure Water Cycle Adventure One Droplet's Big Round Trip Follow a friendly droplet as it floats up to the clouds, falls as r
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Vision Detective
Vision Detective Detective Training • AI Literacy • Ages 9–15 Vision Detective How does a computer “see” a picture?
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US Presidents Quest
US Presidents Quest HISTORY QUEST · AGES 8–13 US Presidents Quest First to forty-seventh, story by story Timeline Trail Who Am I?
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US History Timeline
US History Timeline History is a trail of turning points.
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Typing Tutor for Kids
Typing Tutor for Kids Find your keys.
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Trait Detective
Born with it or learned it?
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Tangram Studio
Tangram Studio PUZZLE STUDIO · AGES 6–11 Tangram Studio Seven pieces, endless pictures Puzzle Pictures Free Build Pick a picture You did it!
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States of Matter Lab
States of Matter Lab SCIENCE LAB · AGES 6–11 States of Matter Lab Heat it, cool it, watch it change.
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Spot the Fake
Spot the Fake SPOT THE FAKE · MEDIA LITERACY LAB Can you catch what doesn’t add up?
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Spanish Sprint
Fast, friendly Spanish vocabulary practice for kids.
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Sound Explorer
Hear that?
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Sign Language Starter
Sign Language Starter Sign Language Starter Say it with your hands.
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Rocket Lab
Rocket Lab SCIENCE LAB · AGES 8–13 Rocket Lab Build it, launch it, fly higher.
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Rock Lab
Rock Lab Earth science · Grades 2–5 What story is hiding in this stone?
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Rhythm Maker
Learn rhythm and beat through play.
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Reaction Rates Lab
Reaction Rates Lab CHEMISTRY LAB · AGES 11–14 Reaction Rates Lab What makes reactions race — or crawl?
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Punctuation Patrol
Every mark has a job
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Prompt Lab
Details are control
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