Yeah, I don't really buy the Piaget POV, but it is what the argument for no algebra before 11 is based on. You need to know their reasoning before you can counter it (or not).

Like, this week DD's teacher needed to tell me about hothoused kids levelling out in third grade and their parents being disappointed. I think I acquitted myself well because I know the reasoning behind her thinking and therefore when it is and isn't applicable. If the OP knows they're talking Piaget and does some reading she'll be able to answer them in their own language.

PS: the E47 answer in that page is wrong, too. Their wording is wrong.

Last edited by Tallulah; 10/28/10 07:51 AM.