Learning objective

Knowledge

  • To describe friction and its effects.

Working scientifically

  • To evaluate a method.

Success criteria

Knowledge

  • I can define the term friction.
  • I can describe

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National curriculum

Science

Forces

Pupils

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Before the lesson

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Lesson plan

Recap and recall

Play the Pupil video: Investigating friction method, which shows a friction investigation from Science, Year 3, Forces and magnets, Lesson 3: Investigating friction. 

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Adaptive teaching

Pupils needing extra support

Should use the Resource: Knowledge organiser: Science – Forces and magnets (from the unit Science, Year 3, Forces and magnets) to help them with both the Recap and recall and the Attention grabber activities; could reduce the data collection to only five items; could be shown slide 2 of the Presentation: Model data and choose which variables from the list should have been controlled to help them answer the evaluation questions.

Pupils working at greater depth

Should consider the control variables before starting the experiment; could test the experiment out on a rougher floor (e.g. a playground or carpeted area); should choose a design challenge from the Resource: Friction design challenges and draw and label their design in their book; could choose an extension activity relating to friction from the Resource: Stretch and challenge: Unbalanced forces.

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Assessing progress and understanding

Pupils with secure understanding indicated by: defining the term friction;

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Knowledge outcomes

  • I can define friction as a force between two surfaces in contact that opposes motion. 
  • I can describe the effects of forces: starting and stopping an object moving and changing the speed, shape and direction of an object. 
  • I can predict the outcomes of balanced (stationary or steady movement) and unbalanced forces (changes to the motion of an object).  

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Vocabulary definitions

  • balanced

    When forces acting on an object are equal.

  • evaluate

    To judge and form an opinion on something using positives and negatives.

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