I read it as an unspoken "within the school system." It seems reasonable to expect schools to include a path for changing tiers if they put such a system in pla

I read it as an unspoken "within the school system." It seems reasonable to expect schools to include a path for changing tiers if they put such a system in place, rather than leaving it up to students to find a workaround. My school supported me in taking trig as an independent study over the summer (with a textbook and slides from one of the teachers plus a few meetings as needed.) This let me take AP Calc senior year; otherwise I would have missed that opportunity due to being placed in the wrong math class freshman year.