From your description of her, I don't think she necessarily needs a dSLR in order to benefit from the fun and passion of photography. There are so many ways photography can be enjoyed, especially today in the digital age. Some people simply like taking pictures. Some enjoy the technical piece of cameras and equipment (which is huge today). And some really get into the post processing aspect of it (ie Photoshop, etc). Really getting into it requires developing skills with all three. That's hard to capture in one class.
I'd first try to get a better sense of what your dd wants out of photography before you jump into buying equipment. So many people spend a ton of money and then realize they didn't know enough about what they were getting into and haven't made choices that will suit them long term. For example, buying a dSLR requires buying into a
system, which will be the base for all future purchases. Not all lenses and flashes, etc, are interchangeable on all cameras.
I have a daughter like yours. And I'm a photography buff myself. My son is definately into the technical aspect and I enjoy teaching him. He uses my dSLR like it's nothing. My dd, OTOH, doesn't care about the technical stuff. She just enjoys taking pictures. I've spent time teaching her and sure, she's picked stuff up, but really, at least at present, she's not interested in more. So her camera is basically my old camera - a bridge camera. Using it almost forces her to learn settings (if she wants good pictures), but it's pretty easy overall. She can still grow with it. She won a prize for this picture (below) this summer, and it was taken using an even older point and shoot. So photography is something you can get into on many different levels.
My suggestion would be to start with having her read something like Kodak's Most Basic Book of Digital Photography, and getting out shooting with whatever camera she currently has. Learn some basic principles, such as composition and rule of thirds, etc. Then she could move on to Understanding Exposure, if she wants to go further. You can gauge, probably at this point, of whether she's really getting into it or not. I can see it in my son when he picks up photography books as his required reading. DD - no way.

Have her participate in the Monthly Assignments and Weekly Photo contests on the Photography Board. She'll learn a lot there. A class in school would probably best capture a little of all three aspects of photography, if that's an option.