The highschool I went to, and my niece goes to now does a different type of block scheduling. Instead of two semesters with 7 classes each, they have three trimesters with 5 classes each. You go to the 5 classes every day for a longer stretch of time. Something like an hour and 15 min per day instead of 50 min per day. You end up getting one more class in per year than the other way. I LOVED it! They didn't give out more homework, but they did teach more. Plus, there was more time in class to actually DO the homework.
It also made your days go by quicker! The lunches were split into 3.
Schedule A would have 2 classes, lunch, then 3 more classes.
Schedule B would have 2 classes, HALF a class, lunch, finish that class, then 2 more classes
Schedule C would have 3 classes, lunch, then 2 more classes.
I was only part of schedule A so I don't know how the splitting up a class would work, but at the time there were way too many students to keep it to only 2 lunches. I'll have to ask if the remodeling that they did changed the lunch schedule!