HippoCampus, part of the Open Education Resources effort (OER), offers multimedia course materials and homework help to high school and college students free of charge.  The Physics section provides sequenced multimedia course materials for introductory/general college physics, college preparatory physics, and AP physics.  Materials are formatted in Adobe Flash, with multiple short video clips, animations, and interactive question-and-answer sets.  Narration accompanying each slide may be turned on or off. Of particular interest to physics teachers and learners is that each module is specifically correlated to more than a dozen widely-used physics textbooks.  Lesson materials are organized by course, unit, and by key-word.  

This is part of a growing project involving many academic institutions whose goal is to improve access to high-quality educational opportunities for all people.  The overall project includes course materials for biology, physics, algebra and calculus, American history and government, psychology, and environmental science.

Please note that this resource requires Flash.