Let Students Choose Their Science Review Topic

“Which science idea would you like to explain better?” is a useful starting point for a review map. Give students three named topics, let them choose one, and ask everyone to finish with an explanation supported by evidence.

Here is a complete set of prompts for Living things, Materials and Forces. Use it after the class has studied these ideas. The routes review different content; each asks students to make a decision and explain it.

Let the choice mean something

Put this instruction at the start:

Choose the topic where you most want another try at explaining an answer. Complete its two tasks, then go to Explain with evidence. Your teacher may recommend a starting topic from your recent work.

Allow free choice when recent work shows no urgent gap. If a student repeatedly uses one mistaken idea, recommend its matching route: “moves means alive” → Living things; “lets light through means waterproof” → Materials; “friction points the way an object moves” → Forces. If much of the class shares a misconception, teach it together before opening the choices. A route choice tells you what a student wants to revisit; it does not establish mastery.

Living things: movement is not enough

Task 1. Sort these examples into living now, dead or from a living thing, and never living:

A growing bean seedling; a living woodlouse; a dried, dead oak leaf; a pebble; a glass marble.

Task 2. “The marble rolls across the floor. The seedling stays rooted in one place. That means the marble is living and the plant is not.” Explain what is wrong with this claim.

Teacher key: The seedling and woodlouse are living. The dead leaf was part of a living plant. The pebble and glass marble have never been alive. Movement across the floor is not a sufficient test: a push can move the marble, while the rooted plant carries out life processes such as growth and respiration. The middle category includes things that came from organisms; it does not mean paper or a wooden object was once a whole organism. A viable dormant seed is still living.

Materials: choose for two properties

Show this test record. Equal-sized, undamaged samples receive the same amount of water; the observer checks underneath after one minute. A separate check asks whether light passes through.

Task 1. A model greenhouse needs a roof that lets light reach the plant and keeps water out. Which sample best meets both requirements? Use both columns.

Task 2. “Anything that lets light through will keep water out.” Does the record support this claim? Give a counterexample.

Teacher key: Choose the clear plastic sheet: light passed through and the underside stayed dry. Cotton is the counterexample: some light passed through, but the underside became wet. Light transmission and resistance to water are separate properties. These results support a choice between these samples under these conditions; they do not show that every plastic is waterproof.

Forces: separate motion from force

Task 1. A block slides to the right on a level, rough tabletop. The hand has stopped touching it, and the block slows. Draw a horizontal arrow showing the friction force on the block. Explain its direction. Ignore air resistance.

Task 2. The same block starts at the same speed on a second surface with less friction. Predict how its slowing changes. Why must the block and starting speed stay the same for this comparison?

Teacher key: Friction points left, opposing the block's sliding motion relative to the tabletop. With less friction, it slows less quickly. Keeping the block and starting speed the same lets the comparison focus on the surface's effect. The motion arrow points right; it is not a force arrow.

Bring every route to an explanation

Use a Text App with Long text at the common finish:

Choose one answer from your route. State your claim, give a specific example or result from the task, and explain the science that links them. Then name the mistaken idea you have rejected.

A Materials response could say: “I would choose the clear plastic sheet. Its underside stayed dry and light passed through. The roof needs both properties. Cotton let some light through but became wet underneath, so letting light through does not mean waterproof.”

Look for the decision, relevant evidence and a science reason. “Plastic is best because it is best” needs a follow-up question; finishing the route cannot supply that explanation.

In Deck.Toys, put each topic's two tasks in one Slide Activity. Set Choose a topic as the only entry point. Connect it to the three topic activities, then connect each topic to Explain with evidence. Do not connect the start directly to the finish. On the finish, set Activity Entry Lock → Activities → at least 1 so completing any one topic route opens it. The established Lock Guide explains this converging-path setting. Keep the explanations as free responses rather than exact-password locks.