These study guides are based off of the textbooks, Biology in Focus: AP Edition for AP Biology, and Chemistry: The Central Science 13th Edition for AP Chemistry. The units/topics covered in my study guides are specific to what was covered in my class at the time I took it. I highly discourage using these study guides as your sole source of study. These are purely supplemental and are a good way of getting in some last minute review/overview. To do well on the tests make sure to review any classwork, packets, slideshows, and/or textbook chapters given by your teacher.