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Make a cube out of straws and have a go at this practical challenge.

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Reasoning about the number of matches needed to build squares that share their sides.

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Tangram Paradox

How can the same pieces of the tangram make this bowl before and after it was chipped? Use the interactivity to try and work out what is going on!

Sea Defences

Stage: 2 and 3 Challenge Level: Challenge Level:3 Challenge Level:3 Challenge Level:3
This activity is designed to encourage pupils to talk about what they see in the images and therefore refine their mathematical language. In trying to reconstruct the basic shape, the students will need to try out ideas, based on their visualisations, using practical equipment. By discussing in small groups, they will be able to refine these constructions and also develop their own designs.