<p>Yeah I guess we technically don't have to take history either although it's IB Business that our school offers that also fulfills the Group Six requirement (totally made that up, I don't really know what group it is but Six sounds good). But if you do take history then it has to be HL. We also have most SLs set as two years courses (second year of a lot of IB classes are HL/SL splits). I'm in SL physics and the two years really gives a more realistic amount of time to get everything down since there's really no chance to take any introductory physics before SL 1.</p>