Mark, I try to have team interaction/team work of some sort in nearly every class. If you limit team interaction just to RATs, there is little time to really build a team; rather, it is a group of students taking a test together. I use RATs, simple on the board multiple choice questions that require group interaction, short answer problem solving, then build up to more complex mini-projects (that can be accomplished in class). I also lecture, but integrate these other activities into the class, replacing some of the lecture with questions/problems for groups, and lecturing for clarification or emphasis. Molly Espey >