Below are OER collections containing a variety of Physics related course materials (e.g., readings, quizzes, simulations, assignments, and more).
Search OER Commons for Physics materials
Link: http://tinyurl.com/zmtvql8
Search MERLOT for Physics materials
Link: http://tinyurl.com/zjgm5ud
SEARCH TIP: OER Commons and Merlot allow you to further limit results by sub-disciplines and material type.