I'm in college and got the 2.4/8/256 (history major). Unless she's in a major like engineering, architecture, design, or art, she'll be fine with the 2.4. The 256gb also goes a long way if you use the cloud and/or external drives. I have a desktop 1tb and a portable 500gb. With those I was just fine with my old MBP with a 160gb. She'll really only need to keep files from the current semester on her internal drive. The 256gb allows for iTunes if she has those as well as photos. 8gb of RAM is pretty much the standard anymore, so I'd highly suggest it.
Make sure she's backing up using Time Machine! This is the other reason to have an external. While an SSD isn't likely to crash, it ensures that she won't lose that paper she pulls an all nighter to finish. I suppose you can use the cloud for that now, but you don't always have an internet connection everywhere, and the average dorm internet is pretty terrible.