Geoffrey Challen is the primary creator and maintainer of learncs.online.
He authored the lesson content and homework problems, and created and maintains the backend systems that power the playgrounds, explanations, problems, and other interactive content. You can find more details about the course infrastructure and more complete credits here.
However, in the years since the original materials were created, other students and faculty from the University of Illinois have contributed to the learncs.online materials. All contributors are listed below.
If you'd like to contribute, please get in touch!