Hey everyone!! This question is directed towards math teachers. I have a few students who do not like to show their work because they can "do it in their head". However, on a test, if I can't see their work and how they arrived at their answer (which, in my opinion, is more important than getting the correct answer), I'm tempted to take points off. Plus, how do I know if they cheated or just guessed? Does this seem too harsh? What do you guys think? Thanks in advance!!