This is the full collection of activity-based physics materials by the authors, which includes units on mechanics, properties of matter, electricity and magnetism, thermodynamics, and quantum physics.  Each topic is broken down into introductory and calculus-based levels.

This is the set of more advanced tutorials on waves and optics by the same authors, designed for students who have completed a high school course in physics.

This is the full collection of workshop tutorials for first-year physics students, developed by University of Sydney physics education group.  Included are materials on mechanics, thermodynamics, nuclear and atomic physics, electricity, and magnetism.