As you can see, homework is very, very, very, very, boring. Exams are even more boring. But imagine a world without homework and exams. Students would just come to class, forgetting all the work from yesterday, or even a few minutes ago! And exams, it wouldn't be fair if you just simply go to a good school and go for good classes if you are the un-intelligent person. So I guess, homework and exams does have a reason.