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.
Highlighted Simulations Standing Waves Entropy Coulomb's Law Conductivity Momentum Sliding Friction Spring and Mass Gravitational Energy Gravity Wells
YouTube Physics Girl Minute Physics ElectroBOOM PBS Space Time Flipping Physics Crash Course