The Cyber Arena, which will be released as open source in fall 2021, provides a hands-on Google cloud learning environment for instructors and students. While high-quality cybersecurity attack and defense simulations have historically been cost-prohibitive, Cyber Gym makes its “workouts” as affordable as possible, with costs that range from one cent to a few dollars per class per week. Instructors can create their own workouts or use pre-existing workouts mapped to the skills in the National Initiative for Cybersecurity Education...