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Can you make a shape sorter, with at least four different shapes and holes, so that each shape will go through just one of the holes?
This lesson plan looks at shape sorter toys – which will be familiar to most students, particularly if they have a younger sibling – as designing and making one can be a good challenge for those in Key Stage 3. It requires a lot of careful thought, particularly if we want to avoid any shapes fitting through the ‘wrong’ hole.
Students will have to decide which shapes to include (they can go for easy or hard options), how big to make them, and how to draw out the required nets accurately. An additional constraint can be that all of the shapes should be able to fit inside the finished box at the same time.
For more Colin Foster geometry and measures lesson plans click here.