Anonymous wrote:9th grade
That's just wrong. In 7th grade, some of the kids take Algebra (who does is based on well-defined criteria and the % of kids doing it varies from year to year) and the rest take Math Analysis. In 8th grade, they're divided between Algebra (which may come in two different flavors) and Geometry. In HS, the range of possibilities proliferates (beyond the 2-3 in MS). Here's the chart that lays out the options:
http://www.gds.org/ftpimages/416/download/Flowchart%2011-12.pdf (I think it's further complicated by the possibility that some courses may be taken simultaneously and some kids find or make room in their schedule to do so.)