The lectures that you guys are adding...what are they for? From what I've been told, the only lectures offered in USC dental are for pre-clinical courses like Amalgam, Composite, Perio, and Local Anesthesia (pretty much subjects that are not on NBDE I).
You're correct on that. Currently the lectures are basically only on the pre-clinical courses. After each PBL case there is a follow up lecture by a professor in that field, questions are submitted to this professor by the student and the professor tries to answer them and review the main topics. A case generally lasts 2-3 weeks. As far as boards go if you put the effort in you'll pass it's fairly rare to fail. You have to pass a qualifying test before USC will let you take the boards. With the NBDE I being pass/fail now passing is all you need.