Help Support Roppers!

I run this site in my free time as a one-man-band. Appreciate any help supporting this mission so that I don't have to use my own money to pay for the various costs. All the courses here are free and will be free forever, but your donations help make this project slightly less expensive for me.


Gold Tier

Silver Tier

Scott Carpenter
Christopher Drain

Bronze Tier

Teach this Content

To your students!

I want you to teach your students this material! I'm working on the teacher's guides right now, but teach this material to your classroom, your club, your friends, whoever. This is an excellent curriculum and I am happy to provide support to anyone who uses this. Email me at if you are interested in this.

All material on this site is licensed under a Creative Commons Attribution Non-Commercial ShareAlike license

The best way to pull this content is from the Gitbook located at

Sponsor the Site

I am very interested in finding corporate sponsorship so that we can continue to provide high quality training for free. I am open to whatever would help your organization; from banners on the site or in the course, adding content or videos, to basically anything else.

Email me at for more information.