American high schools (grades 9+) already give each student customized schedule, so there is no single set of "classmates" anymore - a Computer Science class mi

American high schools (grades 9+) already give each student customized schedule, so there is no single set of "classmates" anymore - a Computer Science class might have 9-th graders and 11-th graders sitting side-by-side. This does not reflect their knowledge levels, it only means that one student decided to take CS first, and other student decided to leave CS for later and take some other class (like Physics) first. This is why parents are unhappy: it's OK to skip most math classes entirely and only do state-mandated minimum... but skipping _basic_ math classes and jumping straight to advanced ones is not allowed.