You're a good student. You try your hardest on every assignment, and you hand each one in on time. But there in the classroom, just moments before your teacher comes around to collect your work, that kid sitting next to you asks the same question they've asked every day this entire year:
"Can I copy your homework?"
It's a tough position to be in. On the one hand, you probably want to help out your classmate, if only so that they don't spread the rumor that you're a selfish jerk. On the other, you don't want to be implicated in a homework-copying scheme. So you agree under one important condition:
"Yeah, just change it a little so it doesn't look obvious."
And the truth is, even after school and beyond, this same dynamic continues. Almost everything in this world can be thought of either as the original homework or the slightly modified copy. In a series of delightful Twitter memes, people are pointing out who's ripped off whom over the years.
With a little luck, your teacher will never notice, and both of you come away with at least a B+. Teamwork is the most important learning experience of all.