Four Layers

3 of 4 layers

Surface Area of first one (yellow through to green) $5+7+9+11=32$
Surface Area of middle one ( as above) $5+8+12+13=38$
Surface Area of right one ( as above) $5+8+12+13=38$


Temp place for notes
Why do this problem?
This activity challenges the most able pupils in their spacial awareness abilities. It also enables them to have something before them to explore and compare.
Possible approach
As this is intended for the most able I would suggest printing out the activity and discussing together first of all, then let them produce their creations.
Key questions
Tell me about your shapes.
So what have you found when comparing them?
What can you now explore about these?
Possible Extension