<p>Disclaimer - I don't know any of the details of this program - haven't read the links. I'm in Georgia, but don't have any more highschoolers.</p>
<p>My D did her first 3 years of HS in Germany, and only senior year here, in which she took AP Calc BC. (For reference: Got a B in the class, and a 3 on the exam, and a 4 on the AB subset. Enough to get her out of college math.)</p>
<p>In Germany, the math is integrated. It made it very difficult to know how to transfer her courses back to the US. Freshmen year, it helped in Algebra, because she'd already had algebra in the US in 8th grade. So she was able to keep up, despite the language difficulties. But she struggled in the geometry aspects, which her classmates had already begun a year or two earlier. By 11th grade, the integrated math was already including aspects of Calculus. Which is why we opted for the BC in senior year, in US, figuring she'd have a head start.</p>
<p>What we didn't count on was the huge gaps in her education. We thought they were due to language or translation difficulties (she'd learned the German words for functions, etc) - but after talking to others who had had similar experiences, we think that the German integrated math just leaves holes. Also, D found that she frequently had to learn the "long way" in Germany, simply because the students hadn't been taught the basics to understand the shortcuts, making things much harder than they needed to be. Fortunately, my H is a math whiz, and was able to supplement her schooling.</p>
<p>My concern for students facing this is primarily if they ever have to transfer to a different school system. I do hate the experimentation the schools go through - often programs chosen because of a superb sales job rather than a superb track record.</p>