Another reason why a student might cheat is simply because they are lazy. And that's the thing some are smart but chose to be lazy and don't study so they just cheat. Sometimes those people become friends with others just so that person copy off of them in tests or homework. I have never been one to be like that but I have seen people that way. As stated in the prompt some say it is just fairly common in the levels of school. .
I myself had cheated on a test because I wasn't sure or I wasn't confident of what I knew. I recently took a finals exam of math and I cheated.