I was grading quizzes today, and this is a match-up quiz, match up the words with the meaning. Not particularly hard I think, involves memorizing fifteen words or so. One of my students got the first ten or so incorrect. Then had what looks like a flash of brilliance because he crossed all of those out (incorrect answers still visible underneath cross-outs), replaced them with the correct answers, and proceeded to get a perfect score on the quiz. Amazing. They do tell me that medical students are quite brilliant at test-taking, having to go through several rounds of tests to get here.
Oh and another student in that corner showed similar brilliance. Only he used a pencil and was able to erase (albeit not very well) his answers and replace them with correct ones. The entire class got perfect scores. Bravo.