This video is a great introduction to the Cyber Range, CloudCTF platform, and steps both teachers and players through what a Jeopardy style CTF is like to play, and even works on solving a few of them just like you would at a live CTF event.
If you're in Virginia, this is free for all public school teachers & students, paid for by the Virginia tax payers. Just have your teacher contact us and request a free account at www.VirginiaCyberRange.org .
If you're not in Virginia, then just go out to USCyberRange.org and ask to set up a low cost, month-to-month account with us through the. We're not for profit, and you only pay for the cloud resources that you consume. Running a 100 player, CTF is as cheap as just $80/month!