Hi, I am a junior who has watched the entire Khan Academy playlist on Calculus out of my own interest for months, and I know how to answer the questions on the BC exam. However, I have taken neither AP Calculus AB or BC. Initially I didn't know that it was possible to take an AP exam without actually sitting the course, but when I found it was possible to 'self-study' I was very pleased because I might be able to receive college credit. However, my school said students who wanted to self-study had to print out a waiver and have it signed by the department head for the subject. When I brought the waiver and asked the math dept. head to sign it, he refused saying that only under "very special circumstances" could someone take the exam without the course. However, I see lots of articles/posts online about people self-studying.
Are there other schools out there that will bar students from the exam if they haven't taken the course? Is there a way to get around this (for example, can I take the AP exam somewhere else)?