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'Turning' printed from http://nrich.maths.org/
Why do this problem?
allows children to experiment with turning - they would not need any prior experience to have a go at the activities. The interactivity is a tool for helping pupils develop the concept of turning and can be used before moving on to angle work.
Show the class how the interactivity works (whether you are using the computer-based version or the card version detailed below) by manipulating it as they watch, talking through what you are doing.
You might want to continue by encouraging children to visualise one of the scenarios. Can someone use the interactivity to show the turning they had been imagining? Invite the rest of the group to comment and refine the motion accordingly. You could then actually find the article and do what is described to see how accurate the interactivity was.
Children could then work in pairs, either at a computer, or with the card version. Encourage them to talk to each other as they try out their ideas.
Tell me about what you are imagining.
How could we "check" what you have done?
Children could demonstrate a turn and challenge other children to select what it represents from, for example, a list of three scenarios.
To make a version of this interactivity which does not require technology, we just need two differently-coloured discs of thick paper or card. A slit is cut into each from the edge to the centre in a straight line. The two slots are then allowed to overlap each other and turning links the two together.