My D took AP Music Theory as a sophomore in HS. She only tested at a 3 - so most likely will need to take again in college - I can tell you Music Theory is valuable tool to have - it certainly in not required to apply to any BFA MT program, as most programs will either make you take music theory or allow you to test out. She actually had to take a MT placement test when auditioning at American. I agree, anything that makes a performer MORE marketable is a great asset. My D plunks at the piano - took lessons for a few years - i keep telling her to brush up on her skills - she may need them someday!