These guides were already written by teachers using the Course and Exam Description. Now they're tighter. Concepts that were mentioned briefly are explained more fully. Examples match what the CED actually emphasizes. Small errors and typos cleaned up.

This wasn't a rewrite — it was a targeted upgrade. The stuff that worked stayed. The stuff that could be clearer or more accurate got fixed.

Check them out at https://fiveable.me/ap-bio →