How this works: every link points to a free resource still hosted by whoever made it — OpenStax textbook PDFs, Khan Academy lessons, university OpenCourseWare, and real instructors' own downloadable PowerPoint decks and lecture notes (Lumen Learning, ScienceGeek, Mr. Wright's Classroom Resources, Prof. Haider at SLCC, Prof. Puwal at Oakland University, Collier's Classroom, Mister Chemistry, McLeod Science, KTL Math, Mr. Perez Online Math Tutor, Mr.E Science, E Math Academy, University of Toronto CSC110, Teach Computing/NCCE, CS50, Python for Everybody, and more). SEA Academy doesn't host, rewrite, or reproduce any of it — it's a map to it, and every link here was opened and checked before being added. Checkmarks and progress save privately in this browser only.