Science
Free science review games for grades 3–6
Three hands-on games for core elementary science units: food chains, electric circuits, and properties of matter. Each one explains why an answer is right, not just whether it is.
Games on this page
Who Eats Whom
Grades 3–5
Follow energy from the sun through a meadow, pond, or forest. Students learn that the arrow points to the living thing that receives energy, and predict what changes when one living thing goes missing.
Circuit Workshop
Grades 4–6
Build complete paths from one battery terminal to the other. Students test switches, bulbs in series, and parallel branches, with a hint and a worked example.
Matter Study Guide Challenge
Grade 5
Classify states of matter, physical and chemical properties, mixtures, and changes. It includes a printable study guide.
Pick the game for your unit
Ecosystems (grades 3–5). Start in the Food-Chain Lab in Who Eats Whom, where students tap a plant or animal to see what it eats and where the energy goes. The common mistake it targets is drawing the arrow toward the food. Each level has eight questions with two tries, and the Why button shows the correct arrow.
Electricity (grades 4–6). Circuit Workshop models one idea carefully: does a complete path exist? It does not model voltage, resistance, or brightness, so pair it with real batteries and bulbs if you have them. Its explore board has no score, which makes it a good place for students to try ideas.
Matter (grade 5). The Matter Study Guide Challenge is the review step before a unit test. The printable guide gives students something to study from at home.
Predict, test, explain
All three games reward reasoning, so they fit a predict, test, explain routine:
- Before playing, ask students to predict: “If the frogs disappear, what happens to the grasshoppers?” or “Will this bulb light with the switch open?”
- Students test the idea in the game, alone or in pairs on a Chromebook.
- Students write one sentence explaining what happened, using the game's feedback as evidence.
- Finish with a whole-class question on the projector and compare answers.
Standards
- Who Eats Whom supports practice toward NGSS 5-LS2-1 (movement of matter and energy among plants, animals, decomposers, and the environment) and the grade 3–5 food-web ideas behind it.
- Circuit Workshop supports practice toward NGSS 4-PS3-2 and 4-PS3-4 (energy transferred by electric currents) through complete and open circuits.
- Matter Study Guide Challenge supports practice toward NGSS 5-PS1-3 and 5-PS1-4 (identifying materials by properties; whether mixing creates new substances).
Frequently asked questions
Is it free?
Yes. Every game is free, with no ads, no paid tier, and nothing to unlock.
Do students need to log in?
No. There are no accounts or sign-ups for students or teachers. Students open a link and play.
What grades are these science games for?
Who Eats Whom is for grades 3–5, Circuit Workshop for grades 4–6, and the Matter Study Guide Challenge for grade 5.
Do they work offline and on Chromebooks?
Yes. They run in Chrome, Edge, Firefox, and Safari. Each game can be saved from the catalog as a single HTML file that keeps working with no network, which helps in rooms with weak Wi-Fi.
Are there printable worksheets?
For science, the Matter Study Guide Challenge prints a full study guide and a results card. Food chains and circuits don't have worksheets yet, so have students record a prediction and an explanation on paper as they play. Spelling, math, and states and capitals worksheets are on the printable worksheets page.
Can I project these for the whole class?
Yes. One question at a time makes them easy to run from a projector or interactive board.
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