School performance increases too easily without homework or exam prep

I am not sure if it’s a bug, but it seems it shouldn’t work this way. 

If kids go to school, their grades go up way too easily — even if they never do their homework. This happens with both kids and teens. Just showing up to school makes their performance rise on its own. Because of that, doing homework feels kind of pointless.

And for teens, there’s really no reason to prepare for exams — if they just keep going to school, they’ll pass easily, often with top grades.

I feel like skipping homework should at least make their progress stop or even drop a bit. And if they don’t prepare for exams, there should be a real chance of failing them.