Learning objective

Knowledge

  • To describe the effects of levers, pulleys and simple machines on movement.

Working scientifically

  • To draw and label a diagram.

Success criteria

Knowledge

  • I can explain the purpose of levers and

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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

Arrange the class into pairs and hand out the Knowledge organiser (one per pair), a whiteboard and a pen. Display the Presentation: What is the question? and read out the rules of the game.

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Adaptive teaching

Pupils needing extra support

Should use the link: Making a windmill on Videolink to make their windmill; could copy the diagram from the Presentation: Wind-powered pulley diagram.

Pupils working at greater depth

Could annotate their diagram to point out the important design features, identify any improvements made and explain how the pulley system works; could extend the experiment by trying to lift items from their pencil case and recording the different times taken to lift them; could choose an extension activity relating to levers, pulleys or gears from the Resource: Stretch and challenge: Unbalanced forces.

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Assessing progress and understanding

Pupils with secure understanding indicated by: explaining the purpose of

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Knowledge outcomes

  • I can explain the purpose of levers and pulleys in amplifying the size of a force.
  • I can explain the purpose of gears in changing the speed and direction of a force.

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Vocabulary definitions

  • amplify

    To increase or make something greater, such as making a force stronger or a sound louder.

  • effort

    The force you use to push, pull or turn something to make it move.

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