I have a hard time with that one, myself. I remember studying Piaget and all that with the water and containers, but it's hard to believe it could be the same with blocks. Sure, the water thing is baffling if you look at two differently shaped containers that both hold the same amount of water but look different. But five blocks is five blocks, no matter what you do to them.

We used to send "alternate homework" sheets back to school with DS, in place of the ridiculous things that came home. More than one teacher responded by saying, "sorry, I just hand out the same thing to everyone by habit, didn't mean to give him one of those, carry on", so to speak.

DD, on the other hand, is bright but so easily distracted that it's hard to say what she might do on one of those worksheets -- it varies from one day to the next.