Credits for Self-taught classes (High School)?

Question

Is it possible to take some sort of 'placement' test for a class I've never physically taken at an institution/establishment. For instance: I've personally chose to study calculus in my spare time, feeling somewhat proficient in the subject, could I possibly test for knowledge of the subject in my high school the without being assigned to the class, and still receive a math credit?

Answer 1

you get no credits