Hey, cool, I shoot with an AE-1 Program. Great camera for what you can buy them for nowadays. You should be able to get one for around $100 or less. From what I understand, the AE-1 and the AE-1P are practically identical, except for the "Program AE" function, which is basically full auto mode.
I don't know how much this matters to you or the class you're taking, but with both cameras, there is no aperture priority mode, only shutter-priority and full-manual.
I dug mine up from the back of my Dad's closet (haven't used it since our family switched over to digital). You can check the battery by pressing the little black button on top, next to the film rewind. If it beeps like crazy, the battery is good.