| since you mentioned just R1A and not R1B, I assume you're a ChemE. You can postpone R1A for your first few years, but you have to take it before ChemE 185/Engin 190 (technical writing, which most people take in their junior/senior year).
I suggest you try to have fun this summer. People who study/worry before college tend to get burned out when they finally get there. Besides, I'm not sure if preparation will really help all that much for the classes you're taking. Math 53 is straightforward, though Hutchings likes to throw a curveball or two on his finals; Physics 7A requires some more ingenuity than high school physics but is still doable if you've got a good grasp of the fundamentals; Chem 4A is a shocker for most people, but that's largely because they don't read the book. Other than maybe reviewing your AP Chem and AP Physics problems from high school, the only thing you should be doing this summer is enjoying yourself. Just be sure to buckle down during the regular school year (it's harder than it sounds, at least for most people) |