I've taught in several high schools and they all had this in some fashion. There are some core credits you must take, but then the majority can be selected from

I've taught in several high schools and they all had this in some fashion. There are some core credits you must take, but then the majority can be selected from a variety of offerings at the school. Expanding these offerings was one of the explicit goals of public schooling in the post-war period (though it has lost priority to accountability since the 1980s).