School Time-Table Software

The most difficult, also most essential, managerial work is to work-out a Class-Routine for the School (HS) as a whole – Curricular & Extra-Curricular Activities, Lab-Practical, Library-time, NCC, NSS etc. Secondly, and the most problematic side is, satisfying the teachers – some prefer not to take 1st period (after a hectic road/rail journey), most prefer to have a off-period before & after ‘a class’ – one for the preparation and another for the cooling-down, some prefer music-classes, dance-classes, art-classes, life-style-classes, environment-classes at 7&8 th period, as these classes are rarely participated by the pupils.
A software is there in UBUNTU, but feeding the data is a tedious job. It would be helpful if you can show some light on it.