> The model has been in place since 2014, yielding a few years of data on retention and diversity that has been picked over by experts on both sides of the de-tracking debate. And while the data is complicated by numerous variables — a pandemic now among them — those who support San Francisco’s model say it has led to more students, and a more diverse set of students, taking advanced courses, without bringing down high achievers.

> California’s recommendations aim to expand the options for high-level math, so that students could take courses in, say, data science or statistics without losing their edge on college applications. (The move requires buy-in from colleges; in recent years, the University of California system has de-emphasized the importance of calculus credits.)