If your teen has siblings, they can do each other's homework just by sending the other kid over to the homework and instructing them to do it. I think they have to be the same age, however.
Same thing in Uni; a playable resident can do any assignment they find.
Lol, but ofcause I can. I can command my own teen do to it himself too. Dah!
But it is not what I want. I play a challenge of my own. I never make my sims do what they don't have a wish for. That is why I have every autonomy hack available. Paying or pursuading to do homework for them is a sencible workaround when they want to go to Uni but do not want to do homework. You see, I've got InTeen Admissions too, so they HAVE TO keep their grades up to get to Uni at all.