It is a very good and easy to use software. It seems to me that it solves everything that you can ask. The only thing I would ask is to improve the way in which the teachers' timetables are displayed when they have supervisions. You know that they are on call, but you can't see the day, the entire timetable is in grey. Some years ago it was known because on that day the strip was in a stronger black. In the timetable, the part of the day when they are on call is highlighted in a different colour, so you can see it.