Several years ago, cooperative grouping became the "in" thing to do in our district, and we were sent to all sorts of inservices to learn how to successfully organize students into groups that worked well together. Working in cooperative groups appeared great in teacher meetings because of all of the over achievers in each group. Sure, there were people like me who cringed at the thought of being the reporter, but, for the most part, each group was a rousing success. Beautiful posters, unique ideas, and outstanding presentations made the day seem like a meaningful experience.
The biggest problem that I always had when assigning kids to groups was that some kids were not considered "group worthy" by their peers. Either they couldn't or wouldn't do their share of the work or were just unpopular with the other students. Regardless of the methods I used for assigning groups, there were always those groups that had arguments and problems. Sometimes when helping one group, I would look over to find that a student had removed himself from his group and was working on his own. Occasionally, this was a bright, industrious student who was just frustrated with his dysfunctional group.
Although team work is crucial in a lot of situations, cooperative group work causes a lot of pain as well. It kind of reminds me of the child who is never wanted on a sports team. Kids know when the rest of the group would rather they not be there. There are also kids who are intimidated by their more verbose peers and just sort of sit back and stifle their own ideas for fear of being rejected.
Students need to spend time learning independently and stretching their minds to think on their own. Working in groups can be a beneficial learning experience, but in my opinion, a little group work goes a long way.