<p>Definitely chem and math. The LS series just needs to be done by the middle/end of sophomore year for upper divs it look like, and you’re only required to take 2,3,4 so it doesn’t have to start fall quarter. A GE is probably the best idea for Fall, and you’d still be on track. The biochem link above has a 2 year schedule mapping out when to take what which quarter. </p>
<p>Orientations have a day dedicated to various workshops about majors, what classes you should take, major planning, research, which series you should take for what major, etc and your counselor will make sure you’re taking the right classes (they arrange an appointment with you to double check your plan). I remember going to a life science workshop and a research workshop (I’m neuroscience), but all of them are optional and I knew a few people who didn’t go to any of them. It might be nice to meet a few other people in your major (they make groups of around 10 per counselor and all the same/related major in a group). Going to an orientation doesn’t necessarily guarantee you the classes you need, but I don’t know how easy it’d be to sign up outside of orientation so I can’t say that it’d be any better.</p>