what does hl and sl mean in ib
IB Diploma Programme Students who pursue the IB diploma must take six subjects: one each from Groups 1â€“5,[20] and either one from Group 6 or a permitted substitute from one of the other groups, as described below.[25] Three or four subjects must be taken at Higher level (HL) and the rest at Standard level (SL).[20] The IB recommends a minimum of 240 hours of instructional time for HL courses and 150 hours for SL courses.[20]