My son has a two period block for AP Calculus. It was supposed to be BC...so you were to get credit for AB period 1 and BC period 2 and take the BC exam. I guess they want more kids to pass so they are only paying for AB exam this year instead of BC so they changed it to Honor calculus for period 1 and AB for period 2. Gives them more time to work on problems during school.

Also same thing with AP physics...but mainly so they can complete labs. 2 period block.