SDN Members don't see this ad. (About Ads) Hello I purchased Dr. Collins study aid about a year ago and i was wondering if anyone had any recent 2011 updates as I am told they have changed the biology and chemistry section a little bit? Also the Dr. Collins I bought only has 9 practice tests for the chemistry section. In another thread i read that someone had a dr collins that had 11 practice tests for the chemistry section?? Does he change all of the packet information or does he just provide updates? For example do I need to buy a whole new bunch of packets all over again? Or is it the same? Thanks!!