Ten? No, our middle school has 7, with one of those being lunch.
Are all ten mandatory or are some for optional electives? For example, our high schools both a "zero" and an "eighth" period, but most kids with a class in one of those will get another period off; the extra time option is just required to make the schedule for certain electives work. And maybe a few ambitious kids use it to triple up on electives ... Our middle school used to offer an elective "zero" period until budget cuts made it unaffordable.
Anyway, I would be surprised if that was ten mandatory, academic, periods. I think 6 or 7 is the norm.
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Mom to an amazing young adult AS son, plus an also amazing non-AS daughter. Most likely part of the "Broader Autism Phenotype" (some traits).