I learned both inter as well as inter group discussions. I learned about the subject knowledge as well as presentation skills once it come to face to face discussions. As considerations of inter group as well as intra group i think we need to identify the external factors of the students...their background as well as skills, knowledge..etc. I participated one teachers training course at University of Colombo, Sri Lanka. Where we had two classes. Once class group has performed by looking at their background, other one is different. Better if we can do a small survey on that first. And i think the topic which we are discussing is also important once we concern about the formation of group.