Вот доставерная информация о том сколько часов работает учитель, нашел на английском форуме. Тоже самое можно сделать и с другими проффессиями. Удачи.
So at the very bare minimum, their day is 7:40am-3:30pm. So this nonexistent 6.5 hour teacher work day you speak about is actually 7 hours and 50 minutes [AT THE BARE MINIMUM]. And I assume you would know this with your wife being a teacher [guess not], but there are weekly meetings that teachers are *required* to attend and that will certainly make up the 10 minute daily difference putting them at a standard 40 hour work week [BARE MINIMUM REQUIRED HOURS].