A story about cheating
My physics prof gave us a take home exam and she asked us to use the powerpoints and the book (with he solution guide) to help us but avoid everything else.
5 students (including me) and who, by chance, were the only ones who ended up with an A in the class didn't get their grades back. She told the class that the ones who didn't get the grade back need to see her ASAP as the last problem's solution was impossible to resolve without using the internet (why give it then if it's impossible to resolve?).
Us, the 5 students, have independently used the solution in the BOOK where a similar problem (not the same but gives us a hint on how to approach the problem) was given and we ended up having the right answer.
She accused us of cheating at first but once she understood her mistake, she appologized.
BUT, after that, she stopped giving take home exams