No worries Casey!
MK, this sort of thing isn't really the same as a foundation program. They are "international departments" within public high schools.
Basically, the deal is that every year there are high achieving students who opt to to America for college. These kids could very well be admitted to high ranking Chinese colleges, but they don't want to stay in China. Having these kids who are planning on going abroad in regular Gaokao classes creates issues for the public schools, and for the kids. Kids who do not need to take the gaokao basically waste three years if they stay in normal public school classes. They also are a distraction for the kids who ARE taking the gaokao, because often they need special permission to go off campus for study abroad specific coursework. So what public schools have decided to do is split these kids up and put them in their own classes. Some public schools have had outside companies (like Ameson) come in and offer international classes (taught all in English, for three years) for these kids. Usually these classes start off with TOEFL and SAT prep, and build up towards AP stuff. AP US History, AP European History, AP Physics, AP Chemistry. Kids who are part of these programs usually pay tuition which higher than what they'd pay normally at public school, but also not exorbitant. Their schedule is set by the program and they are required to take the course load that the program sets.
Other public schools simply split the kids up and then deal with them internally. The school I mostly work for is like this. I teach the kids AP US History and AP Language and composition, but my kids are not required to take my classes -- the ones who wanted the classes paid tuition and I come in and teach them. Their lead teacher is supportive of our classes but she does not require the kids to take them and the students arranged the classes on their own (aside from my classes they've arranged some cooking and calligraphy classes for themselves as well). The kids who are not in my AP classes are basically on their own. Some of them go off campus for SAT/TOEFL tutoring (although we're past that season right now).
Some other public schools set up in-house international programs without the help of an outside company, usually hiring an experienced program manager who is an overseas returnee or foreign born Chinese. If the school is offering a full course-load, they'll charge tuition. If they're just splitting the students off into a class and letting them fend for themselves, they don't charge extra tuition. In all three cases, the students are originally accepted into the main public school, and then at some point, usually in their 2nd year, split off into international class/program once they've made the final decision to study abroad.
If you're an experienced teacher and can convince an area school to give you a shot, this is really an excellent sector to get involved in. The work is very rewarding. The students are capable and mostly motivated (you always have a few duds, but that's true everywhere). I have a student this year who got into to Yale. Others going to Claremont-McKenna, Pomona, Notre Dame, Northwestern, William and Mary, Barnard ... these are not your typical "study abroad because I'm useless and can't do anything else" type kids. Lots of top Chinese students, students whose parents are academics and politicians and professionals, don't even think twice about going abroad. They see Chinese education for what it is and want no part of it. They are, by and large, really great kids to teach. These sorts of schools pay well, give you interesting teaching opportunities, and have a vested interest in holding on to quality teachers (these top students will chew you up and spit you out if you're a hack), so they do not screw around. I've been doing this kind of work for 5 years now and won't go back to any other kind of teaching in China.