It's pretty typical to have flexibility in scheduling. Some classes are mandatory for a particular grade level, the rest is prerequisite-based. At my local sc

It's pretty typical to have flexibility in scheduling. Some classes are mandatory for a particular grade level, the rest is prerequisite-based. At my local school, there was an extra early bird period in the morning if you wanted to take an extra class. We could also take classes from the local community college and have them count as both high school credit and college credit (today, the high school I went to has moved and is now sharing a property line with the community college, so it makes it very easy for students to go back and forth). My niece just graduated from high school two years ago and she's pretty close to finishing her bachelor's, because she had earned a lot of college credit already. For motivated students it really works out great.