Tagged: surface area

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Surface area of spheres- an apeeling lesson…

How do you give pupils a beautiful visual picture of why the surface area of a sphere is 4 pi r squared? A super lesson idea I heard recently involved an orange! Give pupils an orange and a blank sheet of paper. They have to draw circles around the orange onto the paper. The idea is that the circles on...

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Cuboid volume challenge

If you have a 20cm by 20cm piece of paper and you have to use it to make a box, what would be the dimensions of the box with the maximum volume? This worksheet is a take on this traditional old classic lesson idea that combines some good mensuration, nets and calculation work with the spirit of investigation. To extend...