I just want to share it with you, for you to see how well fet solved the timetable

Well, I didn't know it were unusual, the thing is we are implementing FET to start to use it from next year on, that's why I still don't have data about teachers, besides the fact, that things are always done on the run. I suppose I will start to add teachers really soon. About the students, we got the amount of them per year and per activity, but there are not defined groups, I mean the students can choose in between the activities, and they will be assigned to different, and not defined yet, groups. At the beginning I tried the timetable figuring out the possible groups, but it was too much, not certain,  data, so FET couldn't solve it that way, then I decided to work with the well known data.
About the teachers again, I think they will be assigned to the activities settled by FET, so is FET who decides at the end.