If you log in to this site you have joined a free, global open and online course. You have a grade book, autograded assignments, discussion forums, and can earn badges for your efforts.
If you want to use these materials in your own classes you can download or link to the artifacts on this site, export the course material as an IMS Common Cartridge®, or apply for an IMS Learning Tools Interoperability® (LTI®) key and secret to launch the autograders from your LMS.
The code for this site including the autograders, slides, and course content is all available on GitHub. That means you could make your own copy of the course site, publish it and remix it any way you like. Even more exciting, you could translate the entire site (course) into your own language and publish it. I have provided some instructions on how to translate this course in my GitHub repository.This site uses Tsugi framework to embed a learning management system into this site and provide the autograders. If you are interested in collaborating to build these kinds of sites for yourself, please see the tsugi.org website and/or contact me.