@thor Eh.. okay. So in highschool you already lump them together. Igh. We actually put them in appropriate levels of competence classes so they can work together at their appropriate difficulty. I mean, is everybody going to learn calculus then? I know plenty of people from lower levels who'd never be able to do that, how do you solve that?! Not everybody's capable of learning calculus! And yes, I did learn calculus at highschool.