My school offers only IB Biology HL in a 2 year session for 1 period. My options for forecasting next year are either taking regular Biology or IB Biology HL 1. I would like to self-study for the AP Biology Exam next year and pursue the IB Diploma in my junior and senior years. Should I take regular or IB Biology to prepare for the AP Biology Exam? By the way, next year I will be a sophomore and the IB Biology class will not count towards the Diploma.