I am a non-traditional student, and I have noticed some schools have expiration dates for prerequisite courses. Since I have been out of undergraduate school for a few years, I am wondering whether a master's degree coursework is significant enough to give them updated data/grades. I exhausted my school's undergraduate science catalog (more or less) and don't want to retake classes hence graduate level courses. Also of relevance is that I am NOT using this for grade repair. I need fresh material. Any thoughts?