How would a teacher go about handling five different ethnic and religious groups in a multicultural classroom?

This article might be helpful.

http://www.members.cox.net/dagershaw/lol/PrejudiceCauseSolution.html

I also searched Google under the key words "jigsaw method" to get these possible sources:

http://olc.spsd.sk.ca/de/PD/coop/page4.html
http://www.jigsaw.org/steps.htm
http://www.custom-essay.net/free-essays/The%20role%20of%20the%20Jigsaw%20Method%20in%20solving%20intercultural%20problems.htm

I hope this helps. Thanks for asking.