Someone who's "done a lot of photography with a Minolta 5D" and considering minoring in photography is probably not a real "beginner"....
I started with a mechanical film SLR as well (the auto-nothing Nikon F Photomic), so I know the "start with a 50/1.8 and go from there" philosophy. However, you have to keep in mind that most people of her generation "grew up" with zooms. Even as of a decade ago, most consumer film cameras sold had a 38-70mm (or 38-100mm) zoom lens. Certainly, most consumer non-DSLR digital cameras have a 3x zoom (usually 35-105 equivalent).
Given her previous exposure to the Minolta 5D with its kit lens, I'm guessing she is used to seeing the world in the mild-wide-angle to mild-telephoto perspective. She is also probably not used to seeing shallow-DOF photos. Photography is a lot about SEEING the shot even before one raises the camera to one's eye, so I think she'll be better off being forced to see the world differently from what she's used to.
For example, every photography book talks about "use large apertures to isolate the subject when taking a portrait". Well, you just can't "isolate the subject" very well when the maximum aperture is F5.6 at 55mm with most kit lens. And with non-DSLR digital cameras, even F2.8 has tons of DOF.
That's why I think she'll MUCH better off with TWO primes, one wide and one long. Alas, there's no cheap wide prime for the Rebels, so you'll have to settle for the 24/2.8. Couple that with the 50/1.8 (or better yet, the 85/1.8), and you'll end up spending not much more than the 17-85.
With the 85/1.8 (or the 50/1.8, albeit not as effectively), she'll be able do:
1. portraits with shallower DOF than the 18-50/2.8, and definitely the 17-85,
2. compressed-perspective landscapes,
3. many indoor sports like basketball or volleyball, possibly without flash.
With the 24/2.8, she'll be able to do:
1. the usual wide-angle (albeit not super-wide) landscapes,
2. street photography,
3. indoor available-light shots of groups,
4. exaggerated-perspective close-up shots (the 24/2.8 focuses to 1 ft).
Economically, prime lenses keep their values well, and are in stable demand. (Unlike the kit lens which has little second-hand demand, since newcomers often buy their entry-level DSLR with a kit lens included already.) The 85/1.8 and 24/2.8 both have 58mm threads, so filters can be shared. (Should she want to add telephoto later, the 70-300IS also takes 58mm.) 58mm filters are also much cheaper than 67mm ones required by the 17-85, or 72mm ones required by the Sigma 18-50/2.8.
--
If you've posted more messages here than you've taken photos, do everyone the favour and stop calling yourself a photographer.....
http://retroblader.smugmug.com/