I am using Chancellor Study Guides and seem to be doing just fine. I signed up with The College Network, but there study guides are horrendous!!! I bought Chancellor's off of ebay and have passed Micro, A&P, and NC1 so far just using these. They are awesome. I listen to the tapes at night while I am drifting off to sleep. You have to read the Chancellor books at least 3 times to be prepared for the test.