This is not my understanding. The "normal" Common Core plan is students take
Commom Core 8 - 8th grade..
Math1/Algebra I - 9th
Math2/Geometry = 10th
Math3/Algebra II -- 11th
This is actually LATER than it was 5 years ago. This is actually pushing things back by around 1/2 year.. 5-10 years ago California was pushing all students take Algebra in 8th grade. (Didn't really work) Common Core 8 has some topics from what used to be Algebra I & Geometry. And all of the above includes topics from Trig/Pre-calc.
Most average kids took either Algebra II in sophmore or junior year. And then a year of pre-calculus if they wanted to. Note my state only requires two years of H.S. math (must pass basic algebra) & most universities only require 3.
I can't speak to five years ago, but that progression looks an awful lot like the normal experience *cough* years ago when I went through school in CA. Select students were placed on the accelerated math track in 7th grade Pre-Algebra, leading to 8th grade Algebra I, and so on. NT students did something else in 7th, did Pre-Algebra in 8th, and Algebra I in 9th, with the rest of the normal progression looking just like your chart.
