|  Windows (gaps) in teachers timetables | 
			|  We have teacher who teaches only 2 days per week and it doesn't matter which | 
			|  Teacher is teaching 2 lessons per week in class 5A but both are in the afternoon. | 
			|  How to specify min and max lesson teacher shall have on one day? | 
			|  We need one free Math teacher for every period in week | 
			|  How could be distributed the first/last lessons for all teachers in equality? | 
			|  Our class teachers always have to teach the 1st lesson | 
			|  Our teachers cannot teach more than 6 lessons consecutively | 
			|  How to specify a teacher can teach only one 7th lesson | 
			|  We have 10 day timetable (two weeks), I want to spread teacher's lessons equally into these 2 weeks | 
			|  How to ensure lunch break for teachers | 
			|  Each teacher shall have one or two free afternoon | 
			|  Two teachers cannot teach at the same time | 
			|  Teacher cannot teach 4th in Grade 5 and 5th lessons in Grade 6 | 
			|  Teacher must have some lessons in the morning | 
			|  We need two free teachers on each period to make sure we have enough teachers for substitutions | 
			|  Teacher cannot teach both in the morning and in the afternoon | 
			|  Our teachers have substitution duty lessons, we need min 2 at each period | 
			|  Teacher cannot teach in two different classes in one day | 
			|  Teacher can teach max 2 periods per day in one class | 
			|  Two teachers are teaching together, but only 3 times per week out of 5 lessons (lessons with assistant) | 
			|  Teacher cannot teacher more than 3 consecutive periods in one class | 
			|  How to ensure that teacher starts teaching with 1st or 2nd period (he cannot start later than 2nd) | 
			|  Teacher cannot have gap of length 2 | 
			|  Teacher cannot teach both 6th and 7th period. He can teach only one of these two. | 
			|  Teacher can teach max 5 lessons per day, but only twice in week | 
			|  Our teacher must teach in consecutive days | 
			|  Teachers can not teach more than 3 consecutive periods without counting Planning time | 
			|  Our teachers can teach max 5 days in two weeks timetable | 
			|  Our teacher teach two different subjects but they need at least one period gap between. | 
			|  Our teachers can teach only three different week days in three weeks timetable | 
			|  How can I define that teacher can have max 3 consecutive periods(but he can have 2 doubles) |