*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 August 2025, you do not have to be enrolled in high school to take an AP or CLEP exam
Advanced Placement Specific
Exam Price: $99 (w/o reduction as of August 2025)
Readings
Course and Exam Descriptionsavemyexams.com
Videos
Bozeman Science AP Biology Video EssentialsBozeman Science AP Biology Labs
Bozeman Science AP Biology Science Practices
Full Courses
Khan AcademyFiveable
CLEP Specific
Exam Price: $97 (w/o reduction as of August 2025)
Readings
CLEP At A GlanceVideos
General Biology
Readings
Videos
Full Courses
IB Bio Ninja WebsiteI also like the old BioNinja website: linked here