This site contains interactive course notes for algebra based physics. I wrote it for my students, but it might be useful if you are learning or teaching physics. I'm still adding content for 2019-2020. Let me know if you have any ideas or if you have found one of the numerous mistakes.

The code is open source and hosted on github.
It's free to use under the GNU General Public License v3.0.
The diagrams are SVG written in a text editor.
The math is rendered with the typesetting library KaTeX.
The simulations are JavaScript outputting to canvas or SVG.
Collision simulations use the Matter.js 2-D physics engine.