<~~~~ is an architect.
Let's step a little farther back. When you say she's "planning on an Architecture degree", what exactly does that mean? There are Architecture degrees, and there are Architecture degrees.
If she wants to be an actual, state-licensed, practicing architect, she's pretty much going to need an minimum 5-year professional degree. Bachelor of Architecture or Bachelor of Science in Architecture - a liberal arts BA with a major in Architecture won't cut it (ask me how I know).
If she just wants to work in an architect's office as a drafter, etc. a 2-year Associates will work, but will limit her advancement options. If she likes the technical part, it is also possible now to get Bachelor degrees or better in a variety of construction-related fields. However, with the economy as it is, overqualified people are knocking down the doors, so it may be difficult to score a job in 4 years or so with just an Associates.
That aside, is she more interested in the artistic or technical aspects? Architecture has big helpings of both, which is part of what made me get into the field. But the answer to that question has bearing on what kind of architecture school she goes to, and by extension, what she does in high school.
So, I would shape the high school decisions based on her post-college goals, of course. If she is on the technical side, then I recommend she finish up here and apply to technical university programs. You can look for additional course work and AP classes to challenge her more - nothing beats going to college with a fistful of credits for crappy freshman distribution classes you won't have to take.
HOWEVER, if she is interested in the whole design portion of it, it's a different story. At most architecture design schools, they're not going to give much of a crap about the vo-technical stuff she's had in high school. It will never hurt, but it won't help all that dramatically. They're not going to assume anybody in the class has any training in architecture. They're going to start from scratch teaching her visual design basics and build up from there. If she's lucky, by halfway through she will have had 1 technical and 1 structural class. The rest will be history, theory, graphic arts, and design. That's not a bad thing - but it means that if this is her path forward, she should not put too much emphasis on the technical stuff in her current program; at least not to the detriment of a broader array of coursework.
One thing that nobody tells you ahead of time is that at least 50% of an architect's work is communication . Written, verbal, and graphic. Have her take composition courses and public speaking - she'll have to do both. I have been valuable to employers because when necessary I can write very clearly, concisely, and persuasively. That's a skill often lacking. I was very much less adept with verbal communication and presentation skills, but after 20+ years, I'm getting to be reasonable at that too.
In design school she will be required to write analysis papers, research papers, and essays. She will also be required to stand up in front of her class, her professor, and a bunch of the professor's snarky friends to explain her work out loud, then defend it when it is criticized (which it will be). She'll probably have to do this on minimal sleep, too, so any practice she can get now will be a huge advantage.
My best advice is to get her into English courses with a lot of writing composition and public speaking, and a lot of visual arts courses with sketching and painting. Anybody can be taught to draft or detail a building; what she needs help with is bringing her imagination out and generating many many artistic ideas in her work. It's hard to get past that inner editor who stops you from just throwing down options on paper as freely as possible.
I'm not minimizing the technical aspects of the training and career - I wouldn't be interested in architecture if they weren't here too. It's just that side is far easier to train into somebody. If she wants to stand out on the design side, she needs to be very expressive both in words and images. If she's headed that way, the earlier she can get a start, the better.