Hello,liviu, it is possible to add contraints teacher max room changes per day ?
Yes, it is possible, other users also suggested this. It would complicate the things in my opinion. That is why I recommend to add each room in a separate building and use building changes. This might not work if you also use real buildings and real building changes.
In many cases we do not use building , but only work with room
Yes, then add a building for each room and in each building a room.