Problems faced in Group work

I don't feel that we had many problems working as a group as we all get on well and communicate effectively, at the beginning of each lesson we all discuss what we're going to do and what needs to be done. The main problem, for me, was timetabling. We all have different timetables so outside of our media lessons, it's not possible for us to all meet up as a group during free periods and work on the film. To counteract this, we sometimes stayed behind after school or at lunch to work on the project.
Initially there were also slight problems with managing the work, if a member of the group wasn't in but had important work that we needed then we all had to find something else to do so this was inconvenient at times.