Last month, I was able to brag that our fourteen-year-old homeschooled daughter earned college calculus credit through the CLEP test. Yesterday, she passed the Biology CLEP with a score of 58/80, which is good for up to eight college credit hours at many universities. This win is made even nicer by the fact that some of those credit hours include lab segments, and as you know, labs can represent an inordinate amount of time, effort and schedule juggling.
Both she and her brother Morgan prepared for this test by studying a biology text and the REA CLEP study guide, both of which come with supplemental CDs.
The biology text is Essential Biology, With Physiology, Second Edition, by Campbell, Reece and Simon. The text is chock full of useful diagrams and figures, and the companion CD has a lot of useful supplemental materials and answered quizzes. The link above is to the edition we used, but there are newer editions available. Any of them should be great.
The REA CLEP study guide is useful after working through the text. This guide also contains sample CLEP tests, which are very helpful in preparing for the test itself. We used the older version, but the version linked above should be fine also.
And remember, each CLEP passed means fewer hours trapped in a classroom with psychotic professors and easily triggered classmates.