While I am a big fan of cooperative learning, most every time teachers are put in groups to jigsaw or problem solve, I find the groups quickly disintegrate. I think that's more a function of what weisenheimers (sp?) most teachers are, but it's food for thought.
BTW. Last session I went to we came up with a term for teachers who use portfolios according to the precepts of our bible, The Standards!
Portfoliocally correct. We got a big chuckle out of that one.
Dan Hart LAUSD "Home of the world's largest portfolio"