I cheated the school system to re-do a test
Why would you cheat to re-do a test?
I don't remember why I wanted to redo the test
You shouldn't have cheated. It is an unfair advantage to have taken the test twice and makes you do better than you deserved.
Cheating is fun. I might do it again if I remember to.
I don't think you should cheat at school for any reason. You should always be honest when it comes to tests.