indigo - Doing AP on his own hadn't occurred to me. I wonder if they have AP Earth Science? Maybe I could get the school to let him work on some extra challenging Earth Science during units he already knows.
There is no AP Earth Science test, and the environmental studies is very far afield from what most would consider Earth Science (rock cycle, plate tectonics, earth history). Sadly, few high schools offer a college-track Earth Science class either. However, that has the potential to change as the NGSS include Earth Science as a college-track class.
Consider a community college Earth Sci class if a higher level earth science is the goal. Things like MOOCs are out there, and many are of high quality, but none can replace the hands on aspect of geology: the rocks. I'd be happy to vet any course you do find, though, if that's a help.
