I can't count how many times I've wanted to ask a teacher if I can take the test before everyone else. We learned on Monday we have a test on Friday, it's killed me that I can't ask to take it now and get it over with.
It bugs me more when teachers are like (imagine this in a really high pitched voice, please!) "Okay class! You have the entire week to study!~" and it's just like I could answer the questions in my goddamn sleep.