<p>I know there is a consolidated AP book suggestions thread, but this forum seems to be lacking a thread entirely devoted to online resources for those who are either self-studying or in need of additional notes for AP preparation. If we can produce a list of helpful online study aids or notes pages, I personally believe that would be very beneficial not only those seeking alternatives to buying an AP review book, but also the CC community as a whole. Many thanks for your participation and attention.</p>