Class reps. serve as the main link between the C4Cs and upperclassmen. If the upperclassmen need something done, they will make sure the class rep lets everyone know. The class rep. (as far as i know) was chosen by the upperclassmen because he/she was a strong leader and had "his/her stuff together." I'm not sure if they serve the whole year or if they change at the start of the new semester. Hope this has helped.