Hi Mable, The use of student groups will really help all of the students become involved. This is due to peer pressure from each of the group members for each of them to pitch in and carry their weight and the fact that in small groups even the most shy students will contribute. Have your small groups come to the front of the classroom and sit behind a table as a panel of experts would. Since you are asking them to become experts in certain topics the panel formal will work well. This way each member of the group can present their part without feeling excessive pressure from being in front of the class. The reason for this is that they are sitting down (less attention on them) behind a table (a barrier between them and the rest of the class) and there are 5 or 6 other people up there with them (helps them with confidence). Good luck with your groups. Gary