So another question becomes - how high does the AR Math go? What is planned if your son 'finishes?'

Right now- there is no plan. The teacher doesn't really understand the Accelerated Math program and is dreadful (actually, disinterested) at differentiation. I've been pushing for an actual plan but haven't gotten one yet.... administrative run-around in a very complicated political situation. It's a charter school in a district about 2 days from being taken over by the state. We've gotten a bit of a "take it or leave it" attitude from them lately since they will be unaffected by the state takeover.