I know they do in mine. At the end of the final marking period, any Senior who isn't passing (or "close enough" in the teacher's opiniion) fails. Our Seniors finish up in early May (as opposed to late June like the rest of the school. Here's why: Seniors who fail attend summer school before graduation. They're allowed to attend up to 2 classes during those weeks. It's an hour and a half a day for several weeks (in uniform.) At the end of that time period, they take another Comprehensive Exam. If they don't pass, or if they've failed more than 2 courses to begin with, they don't graduate. They can take additional summer school courses to achieve that diploma, but it must be earned. I have to admire our administration for taking the tough stance here. Our diploma means something more than 4 years of attendance; the kids actually have to demonstrate mastery of the material.