What are some of the best resources to prepare for Honors Bio and Honors Geometry over the summer?

I’m going into 9th grade, and am taking Honors Geometry and Honors Biology. I was wondering, what are some of the best online courses/OER/MOOC’s to use in order to get a head start/prepare for the classes?

Note: I’ve already started a few courses on Edx, Khan Academy, and Alison, and have gotten textbook resources from CK-12, so no need to restate those websites. It’d be best if there was a single website I could use to study, instead of trying to keep track of multiple website/resources.

Thanks in advance to everyone who responds!