kuniggety
2nd Black Belt
By my estimation, he's not actually still collecting tuition. The OP refers to an annual payment. If the school is closed for 6 weeks, I don't see how you can manage to pay for the entire year and not include those 6 weeks - that's just how an annual fee works. Presumably (and it's an assumption, yes) the annual fee is to cover 46 weeks, rather than 52.
I was thinking about that too. I have seen/heard of schools doing an auto-payment for a reduced rate. Maybe it's because I haven't trained at a small enough school but I haven't seen any shut down like that. If the instructor takes a break then assistant instructors just cover for them for awhile.