As I said in a previous post, I have many questions.  I believe it would
be best if I only asked a few at a time, so I'll start with these:

1.  How much work is done by the groups outside of class?  One problem I
would encounter in a high school group is that many students do not have
the means to drive somewhere.  I'm afraid, though, if I chose my groups
based on where students live, that I would lose some of the diversity.  
(I live in a very large district in terms of land area.)

2.  How do you keep groups from passing answers to later classes?  I'm
not thinking about multiple choice answers, because that would be easy
to solve.  I'm thinking more like a lab result.  Maybe I have a group
work in the lab to identify a substance, and this might be an experiment
I cannot change for each class, so the answer would be the same.  (I
think this would qualify as a team-based activity, since I could have
simultaneous reporting of the answer, which could lead to a lot of
disagreement.  Right?)  Anyway, this would be an easy answer to give to
a friend.
   Maybe I can only do this with experiments that can be slightly
changed, but that would really complicate my life!

Thanks,

Karen Hoff