One of the selling points of re-hashed American 1990s high school math programs is that they are "integrated", that is, combine algebra, geometry, statistics, trigonometry just like the European programs do, and the Europeans know better (obligatory nod to Finland follows).
Considering that SE is visited from all over the world, I am interested in validity of this statement. I wonder which countries use integrated math course for HIGH school (not so much interested in middle school, but factoids like starting geometry in 7th grade are appreciated). Also, which countries use courses like algebra and geometry simultaneously in the same grade.
In particular, in Russia algebra starts at 7th grade (elementary and secondary school altogether is 11 years). Geometry also starts at 7th grade simultaneously with algebra. Two subjects are taught in parallel, but the textbooks are separate for each subjects. Physics also starts at 7th grade (there is no "science" subject in Russian schools, there are physics, chemistry, biology, geography, astronomy). All three subjects mentioned above go for five years until the end of school. The last two years of algebra deal with trigonometry and pre-calculus (basics of differential and integral calculus), all mandatory. The last two years of geometry deal with stereometry (3D geometry). Physics do not use any calculus in it, only some trigonometry is used.
I especially would appreciate links to specific programs and textbooks. Searching online is not that easy, considering that I don't know French, German or, say, Malay (meaning that I welcome info from all over the world, not only from Europe).