MIT OpenCourseWare provides free access to course materials from MIT classes across physics and mathematics.
Caltech provides publicly accessible lecture notes and course materials from university-level physics instruction.
Harvard University hosts open course materials including David Morin's classical mechanics textbook.
Digital library of peer-reviewed physics education materials, demonstrations, and teaching strategies.
Coursera offers recorded university lectures and courses but not problem books or detailed solution sets.
Leonard Susskind's online lecture course covering fundamental physics from classical mechanics to quantum field theory.
Collaborative open-source collection of physics textbooks and learning modules.
Platform offering free online courses including introductory and intermediate physics from universities.
American Association of Physics Teachers repository of experiments, demonstrations, and lesson materials.
Open-access textbooks covering classical mechanics, waves, thermodynamics, electricity and magnetism for first-year university physics.
Wolfram's cloud platform for mathematical and physical computations.
University course or institutional resource (Griffiths Electrodynamics covered).
Curated collection of physics and science study resources and notes.
Open College physics course offering theoretical explanations and problem sets.
Russian repository of physics educational materials, theory summaries, and worked problems.
Moscow State University lectures and course materials on physics and mathematics.
Theoretical physics website with course materials and problems inspired by Landau's work.
Russian educational platform offering interactive physics problems and lessons for secondary students.
Materials from Moscow State University's mechmath faculty, covering university-level mathematics and physics.
Physics department and courses at Sofia University, organizer of national and European physics olympiads.
InternetUrok is a Russian platform offering video lessons aligned with school physics curriculum.
A platform offering structured online courses in physics, mathematics, and computer science.
Major German free physics resource with theory, explanations, and solved problems.
Free physics and chemistry courses with exercises for lycée and university level in French.
These are filed under other headings but serve this one too.