*usually, exams that grant college credit can be taken without enrolling in a class. Although, this will require the test taker to "self-study" (teaching themselves the material) to be prepared for the exam. This is a great option for students whose schools do not offer many higher level classes.
*As of May 2026, you do not have to be enrolled in high school to take a CLEP exam
Advanced Placement Specific
Exam Price: $99 (w/o reduction as of May 2026); $40 cancellation fee
Readings
Course and Exam Descriptionsavemyexams.com
2025 Barron AP Biology Premium
Princeton AP Biology Premium 27E
Past FRQs
Videos
Bozeman Science AP Biology Video EssentialsBozeman Science AP Biology Labs
Bozeman Science AP Biology Science Practices
Full Courses
AP Bio PenguinsKhan Academy
Fiveable
IITian Academy
CLEP Specific
Exam Price: $97 (w/o reduction as of May 2026) +Administration Fee paid to the testing site
Readings
CLEP At A GlanceVideos
General Biology Resources
Readings
ThriftBooks: Life: The Science of Biology (Sadava) (the book i used in college)Videos
"High School Senior Biology" (Dr. Matt and Dr. Mike)Full Courses
IB Bio Ninja Website I also like the old BioNinja website: linked here
Wayne's World Bio 101