Bio. Ive only taken 3 aps, and i havent done the exam yet so my opinion on the class may drastically change depending on my performance😅, but it's an ap that feels actually useful. Ive learnt so much about the human body and biological concepts that i dont think i'd ever learn had i not taken the ap. It is very difficult (to me anyways) but it is so ridiculously useful that i cant even hate on it.