Learning Courses During the Summer(Anyone who have experienced these courses please answer!!!?

Hi, I'm a freshman, well a soon-to-be one. Anyways, when I start high school, I most likely will get into Geometry, World Geography (Honors), Biology, Spanish I, and English I (Honors). I want to go to Yale. Anyways, which of these courses are the hardest in, so that I can get a head start in learning them?? Thanks :).