There are conflicts about amount of contributions made by various individuals, sometimes conflicts with me in my evaluation of an individual s contribution. Students journals are a must. Informal observations and talking with them is a must. I use e-mail to communicate. Any problems are usually related to personalities.
Students seem to appreciate the interest in their participation.
Once I had each student do an evaluation of all the other students in their group. This did not work very well. I tried to do the student journals, but failed. It is not easy to for them to keep track of their group activities. They think this is too much extra work.