She doesn’t really need to “focus” on anything right now. She’ll be a freshman who will be exploring many things in her next 4 years. Encourage her to take any science classes she wants. My D didn’t know what she wanted to study until she’d already applied to colleges (mostly undeclared). While she’s always been very strong in math and science, she didn’t do “sciency” things in HS (track, tennis, mock trial, digital arts classes, writing stories and poems). Took 2 years of Chem because she liked the teacher. Didn’t take AP Bio because she’d heard less than great things about the teacher. Never took physics, probably because she didn’t have room in her schedule and/or it didn’t particularly float her boat. Took AP Enviro Science her senior year because it looked interesting, and the interdisciplinary nature of the class appealed to her. It’s the one class she always talked about. Now she’s a rising junior at UCB majoring in Environmental Science and minoring in GIST. She’s doing an internship this summer in the Environmental Health & Safety department at a pharma company back east. If you had asked me what she would be doing in college back when she was a HS freshman, I wouldn’t have known how to answer.