Over the last five years, the United States Air Force Academy (USAFA) has participated in numerous Capture the Flag (CTF) and other cyber competitions. At first, this was simply an extracurricular club activity; however, as we have seen the impact on student motivation and learning, we have greatly increased student and faculty participation. Additionally, we have started to base entire for-credit courses on a CTF framework. In this paper we discuss our rationale for utilizing CTFs as part of our formal curriculum, as well as key lessons learned relating to student engagement and avoiding cribbing.