Well, I must first stress the importance of doing everything you can "before" problems arise...the
proactive approach rather than the
reactive approach. But of course problems still happen.
I suggest reading this blog post I made a few months ago:
http://teaching-tips-machine.com/blog/?p=64There is a link to my report on the
Law of Least Intervention as well as a sugesstion on what to do instead of punishment when the proactive apporach still doesn't work.
Hope it helps...
--Adam