A set of definitions exists in the Senate ESEA bill written and voted out of the HELP Committee (Health, Education, Labor and Pensions).
Reps and sets are terms used by exercise professionals, athletes and individuals in the gym. They provide structure and organization to your workout. If you work with a personal trainer or physical therapist, she will prescribe an exercise based on a specific number of sets and reps.
Experience (XP/Exp) is required to level up your character. Experience is gained by defeating enemies or completing quests, and varies based on the enemy level or difficulty of quest.eputation (Rep) is used to increase your rank within Factions.