> (Not being an elementary school teacher, I can't say HOW to do this, but) One > way to show invariants is through coloring problems. Map colorings generalize > easily to other surfaces, and I'd think that having kids try to find the > maximum colors needed for a mobius strip, or a torus, would be inherently > interesting for them. (Seems like a good topic for a heterogenous class, in > fact.)
YESS!! Now THERE's some math. Have you got any ideas for flexagons?
Cathy Brady Math Specialist/Education firstname.lastname@example.org Maryland Science Center Opinions are my own "Beyond Numbers" exhibit or something I overheard Baltimore's Inner Harbor