I remember that being a thing at some of the other schools when I was in high school. Not at mine, though. It was always a seven period day starting from 7:20 and ending at 3. Most people only had to attend 6 of them, though, and seniors especially only went for 5 so they could get out at lunch.

But heck if I know if that was considered the norm then. ¯\_(ツ)_/¯

...Gah. Talking about high school makes me feel older than I actually am.