CyLab Security Academy (formerly picoCTF)

A free cybersecurity platform where students solve hands-on challenges in cryptography, forensics, web exploitation and binary exploitation, following guided learning paths and video lectures. Teams of one to five compete in mini-events and an annual capture-the-flag competition with prizes for US middle and high school teams.

Prizes offered in some competitions; eligibility limited to US middle/high school players and no amounts stated on the page