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In this unit, children develop an understanding of simple electrical control through the designing and making of an alarm system. They are also introduced to the idea of feedback. The designing and making assignment involves an alarm system to protect a valuable artefact which has been brought into the classroom. The children could experiment with the use of a control program.
This unit could be adapted to focus on an alternative context which includes a system which does not produce movement eg lighting a house/room, headlights on a vehicle.
Unit 4C 'Torches' and Unit 4E 'Lighting it up' are appropriate alternatives to this unit.
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