Here’s the link: MIT OpenCourseware Biology
Here’s their blurb:
We have selected relevant material from MIT’s introductory courses to support students as they study and educators as they teach the AP* Biology curriculum. This section is organized by the topics that you’ll see on the biology exam.
MIT’s collection of video, audio, problem sets, and exam questions provide a good review for mainstream biology teachers and can be adapted for on-level resources. While the average biology student would struggle with this material, it provides a good starting point for teachers.