We have 10 day timetable (two weeks), I want to spread teacher's lessons equally into these 2 weeks

If your teacher is teaching for example 23 lessons per week (46 in total) and you are using 10 day timetable (2x5days) it can happen that the software generates 30 lesson in one week and 16 in the other week.

To prevent this, you have to define advanced card relationship that defines max lessons teacher can teach on the first 5 days (first week):