Lately there has been a lot of chatter online about searching for "chapter study guides." While this is not the most recent edition of the text, it is a publicly accessible online companion site (hence, no need to have purchased the text to access this). This has numerous "study guide-like" features (reviewing concepts, critical thinking, short essays, etc.) that could be a benficial for teachers to find resources as well as to give to students for them to use as supplemental materials.
Via Seth Dixon