A simple challenge
Ask your users to program too!
Classic multiple choice questions
Design your own questions. Understand where your students excel and where they might need to improve.
Creating light competition drives users to out-do one another on the public scoreboard and also ask each other about their approaches.
Visualize your users with their skill graphs.
With easy to use visualizations, you can quickly infer the state of a team without getting into the nitty gritty..
The administration panel gives you the ability to manage teams on the fly.
Send messages, edit team information, create new pages, add new challenges, and lots of other features are available to admins.
You can also customize CTFd with themes and plugins for infinite customizability on a rock solid base.