I love the way you can go to your PLN and ask for help and ideas.
And I love being able to help when someone else puts out the call.
So when I got a message the other day from a Twitter follower asking for ideas for promoting inquiry into 3D shapes with a Year 2 class, I was happy to help.
Here's the ideas I came up with. You can probably think of others that you might suggest in the comments section below...
1. I like to refer to 3D shapes as "real"shapes - they exist in reality. Unlike 2D shapes which only exist in the imaginations of geometrists. 2D shapes are not real - they cannot exist in the 3D world. We can see representations of them but everything "real" has depth.
2. Get out some paper shapes - circles, squares, triangles etc to see what shapes the kids can make using flat shapes as faces. And what about if they curve the flat shape, like to make a cylinder? What shapes can't they make? (Have a chat with Mr Mercator about the sphere..) Continue the discussion about nets and how to assemble a 3D shape from a net.
3. Get some solids and paint the faces then print onto white paper. Reassemble a copy of the original solid from the net formed. Try with a sphere haha!
4. Use playdough to make 3D shapes - very tactile and great for kinesthetic kids. Make sure sides and angles are straight with a ruler or flat edge.
5. Do cross sections of prisms etc by cutting playdough with plastic knife of pulling apart the stack made in 4 (above).
6. Use plastic shapes, squares, triangles, circles etc, to make a stack of similar shapes to create a prism - a shape projected through itself. What happens when you lift up half of the stack? What shape do you see in the cross-section?
7. Get kids to group a set 3D shapes - what properties do they have in common? What characteristics can be used to classify them - prisms, pyramids, curved faces etc.
There are lots of ways to explore and investigate 3D shapes. The most important thing is to actually make physical contact with a few of them, not just look at pictures in a textbook.
Have some fun.
And post a comment if you have some other ideas on how to explore 3D shapes.
Here's some suggestions that have come through so far:
Suggestion 1: Imagine you live inside a 3D shape. Design the interior. Next, perform a mime for the class about living in that shape. Class guesses what shape you are living in.