I took the AFOQT at Arizona State University's ROTC Det. so that I may apply to guard units. The ROTC commander, after seeing my scores, made a brief attempt at getting me to go for my masters so that I could be in ROTC at ASU. I politely said 'thanks, but no thanks', but I guess that shows that ASU is at least one school where you could do ROTC while working on a masters degree. Food for thought.