GROW Β· Science Β· Week 3

Friction: Friend and Enemy

Aut1Β·W3 β€” Explore friction and how it can be helpful or unhelpful.

White Rose Science Year 5/6Pearson Entry Level Science 8939 (E1β†’E3); AQA UAS science units
🎯 Learning Objective: I can explain what friction does and give examples where it helps and where it hinders.

βœ… Success Criteria

  • I can state that friction opposes sliding, or attempted sliding, between touching surfaces.
  • I can give one example where friction is helpful and one where it is unhelpful.
  • I can predict which surface will produce more friction, and say why.
πŸ”— Assessment link: AQA UAS: 'Forces'.

πŸ–¨ Teacher print tools

Lesson A resourcesLesson B resources

Staff: feedback and marking

Make participation possible

Use regulation time, a trusted adult, accessible response routes and permission to refuse. The small help prompt is optional; useful feedback remains part of ordinary teaching. Refusal is information, not a reason to invent a response or punish passing.

Lesson A: a claim worth revisiting

During We Do 2, invite a pupil to identify one word or idea in a sorted claim that needs checking. Hear, read or watch the response. Use the actual surface-pair example to adapt the explanation, scaffold or next question. Keep this within the existing eight minutes of sorting and correction, then use two minutes for the exit.

Lesson B: review the evidence

After the 32-minute workshop, use four minutes to revisit one conclusion and its supporting results with the adult, then four minutes for the exit. Use the existing record or an equivalent response; do not require a separate loop sheet. Explain any limit on a requested change and check whether the response helped.

Listen and act

Space makes participation possible; Voice is the pupil's response in their own modality; Audience requires the adult to engage with it; Influence is the resulting adjustment to explanation, task, scaffold or subsequent teaching. One optional displayed prompt does not limit genuine feedback exchanges.

Use marking codes honestly

Use R only after a pupil response and genuine adult engagement. A click, download, opened explanation or completed exit does not automatically establish Audience, Influence, R or an assessment outcome. Record only the evidence and help actually provided; do not require a duplicate written record for every task. Use agreed policy codes appropriately. Extended writing or assessment may need one or two precise next steps and response time.

Policy and timing

Feedback & Marking Policy 2025/2026 (Pilot), Issue 1, May 2026; master order Β§25.3. Lesson A remains 40 minutes. Lesson B remains 32 + 4 + 4 minutes. No extra pupil form, signature, standalone participation stage or progression gate is required.

Optional existing staff records; use only when appropriate.

Two separate 40-minute lessons: Lesson A: Friction: Friend and Enemy. Lesson B: Friction: test the surfaces. Keep this deck and your work for both lessons.

Arrival Β· four quick questions

Arrival task β€” pick your tier

Choose one route. Point, say, sign, draw or write. You may pass or say not sure. Use screen or paper; you do not need to do both.

For question 3, hand rubbing is optional. If comfortable, gently rub your hands for up to five seconds; stop at discomfort. You can watch an adult or describe a familiar hand-rubbing example instead. Say whether you observed it, remembered it or predicted it.

1. A push moves a toy car away. Which action moved it? Push / pull.

2. Look at two palms pressed together. Which surfaces touch? Palm and palm / palm and sleeve.

3. Use your chosen route. What do you notice when hands rub? Say, point or draw one observation.

4. A shoe needs to grip the ground. Does grip help walking or make slipping easier? Help walking / make slipping easier.

Show Supported arrival answers

Allow four minutes within the existing arrival stage. Read or scribe as needed. Start from what pupils show; the word friction is not required before it is taught. Accept uncertainty and equivalent responses. Discuss one useful observation rather than completing a second record. A remembered example or prediction is not a measurement made today.

  1. Push. Accept pointing to the word or showing the action.
  2. Palm and palm. Accept indicating the two touching surfaces.
  3. Accept what was actually noticed, including no noticeable warmth. A remembered or predicted change must be identified as such; do not invent an observation.
  4. Help walking. Grip helps stop the shoe slipping against the ground.
πŸ—ΊοΈ Today at a Glance

Three things we do today

🎬 How our animations talk to you. Every movement means the same thing in every science lesson this year β€” watch for them.

1.

Define friction properly

2.

Helpful vs unhelpful

3.

Predict and test two surfaces

πŸ‘©β€πŸ« I Do Β· watch me think

Watch me test two surfaces

🧠 Watch me think: Same block, same ramp, same angle. I change ONE thing: the surface. Carpet first β€” it barely moves. Now the same block on the smooth board β€” straight down. One planned variable changed, so repeated results can give evidence about the surface in this setup. That is the whole logic of a fair test, and we will use it again later in this unit.

πŸ“– Key definitions

  • friction β€” A force between two surfaces that are rubbing or trying to slide.
  • surface β€” The outside face of an object, where the touching happens.
  • grip β€” Useful friction β€” stops slipping.
  • wear β€” Damage caused over time by friction.
❌ Common mistake: Friction is always a nuisance.
βœ… Actually: Ask what happens on ice. No friction means no walking, no stopping, no steering.
Use the remaining practice time: Model the same release twice before changing the surface. Invite a prediction by pointing or saying; compare the stops and locate the measuring zero. Label the animation a simplified illustration, not a measured result.
🀝 We Do · together

Helpful or unhelpful?

Decide before you tap.Found 0/5
Bike brakes
Trainers on a wet floor
Engine parts rubbing
Pushing a heavy box across carpet
A door handle

Use the remaining practice time: Choose two examples first: brakes and engine parts. For each, identify the two touching surfaces, the motion and whether resisting it helps the intended job. Remaining cards are optional practice.
πŸ‘©β€πŸ« I Do 2 Β· the evidence loop

Evidence loop

🧠 Watch me think: The sentence shape that earns marks: 'Friction is helpful HERE because ____, but unhelpful HERE because ____.' Same force, two verdicts. That contrast is the answer.

Assessor witness Β· what the adult is watching for

  • Defined friction as a force between rubbing surfaces.
  • Gave one helpful and one unhelpful example.
  • Predicted, tested and recorded a surface comparison.

πŸ“Έ Capture: Photograph the pupil's surface-test results table with their prediction still visible.

🀝 We Do 2 · sort, then write

Sort the claims

Sort, don’t guess. Put each card in the right bin.Sorted 0/5
Friction opposes sliding between surfaces
Friction only happens with rough surfaces
Oil reduces friction
Without friction we could not walk
Friction is a bad force
● TRUE
β–  FALSE
β–² NOT A SCIENTIFIC CLAIM

Use the remaining practice time: After sorting, test a changed case: smooth rubber on smooth glass can still grip. Ask which claim needs correction, then explain why the actual surface pair and evidence matter.
Need a different way to take part? (optional)

During the claim sort, point, say, sign or show the adult an idea, question or change that would help. You may pass or speak privately. The adult listens, explains what can change and checks whether it helped.

Finish Lesson A Β· two small checks

Friction exit

Two small checks to finish Lesson A. Point, say, sign, draw, type or use paper. An adult can scribe your words. You may pass; complete one route, once.

1. A box slides right on a floor. Which way does friction on the box act?
2. Bike brake pads rub on the wheel rim. Does this help slow the wheel?
Compare Supported explanations
  1. Left. Friction on this sliding box acts along the contact, against its slide to the right.
  2. Yes. Pad–rim friction helps slow the wheel. The touching surfaces and the intended job make this a helpful example.

Use these with an adult. Your response is not automatically marked.

Next lesson: Friction: test the surfaces

Stop after Lesson A. Keep your work. Next lesson: Friction: test the surfaces.
✏️ Independent Work

Your turn β€” pick your tier

Lesson B: Friction: test the surfaces β€” restart here. First retrieve the previous lesson; the workshop includes its own check and tidy-up.
32-minute workshop. Use the phases below. Choose a supported, standard or stretch route with your adult; pointing, signing, directing, drawing or writing can show the same science.
32:00

β—† Supported

Direct or observe the three-surface test with an adult. Point to the start and stop marks; enter or dictate results in the supplied table and choose a supported conclusion.

β–² Standard

Test three surfaces with repeated releases, record distances in centimetres, and use the results to identify which surface resisted sliding most in this setup.

β˜… Stretch

Compare repeated results and an uncertain run. Explain a control or measurement improvement, retry if possible, and qualify your conclusion to these surfaces and this block.

A surface test with evidence

  1. 4 min: Retrieve your Lesson A prediction. Check the fixed low ramp, the same sliding block, release mark and safe run-out; choose tester, observer or recorder.
  2. 20 min: Release the block without a push onto each of three level test surfaces. Measure from the same ramp-foot mark to where it stops, in centimetres. Aim for two trials per surface; record a non-slide rather than inventing a distance.
  3. 2 min: Pens down if you are writing; pause and check. Compare repeats and check one control variable. A different push, slope or measuring start makes a comparison uncertain.
  4. 6 min: Repeat one doubtful run if time allows, draw an evidence-based conclusion, and return the equipment. If trials are unfinished, record that honestly.

Access and equipment: Adult-secured low ramp, one small sliding block, three level surface samples, ruler/tape and a tray or padded stop. Keep release height and the ramp-to-surface join fixed. Keep hands out of the run; no oil, loose powders or pupils sliding on floors. Observation/directing is an equal route.

SurfaceTrial 1 / cmTrial 2 / cmWhat stayed the same?
1 __________________________________________________________
2 __________________________________________________________
3 __________________________________________________________

If equipment is unavailable: analyse this invented teaching data for the same controlled setup, labelled as model data: card 42 and 44 cm; fabric 25 and 27 cm; rubber mat 15 and 18 cm. These are not pupil measurements and do not prove a universal order for materials.

My conclusion: ____________________ because ____________________.

A result or control to check: ____________________.

Review Β· use your results

Review the evidence

Use your existing results or the clearly labelled model data. Point, speak, sign, draw or use your current work; no extra feedback form is needed.

  1. Choose one conclusion. Show the adult which results support it. Name the surfaces and whether the evidence is measured or model data.
  2. Consider the feedback. Does the conclusion fit both trials? Check one control or uncertainty; a surprising result is not automatically wrong.
  3. Keep or improve your explanation and show why. The adult responds to your idea or question. Keep the original results; label any later retry separately.

You may ask for more thinking time, use a trusted adult or pass. Finish with the existing exit question; this review stays within its four minutes.

Need a different way to take part? (optional)

While reviewing your evidence, point, say, sign or show the adult an idea, question or change that would help. You may pass or speak privately. The adult listens, explains what can change and checks whether it helped.

🎫 Exit Ticket

Before you go

β—† Supported

Name one place friction helps.

brakes / shoes / tyres / handles