In many places it's become a fundamental part of the middle school math curriculum, too. In recent years, more students have begun taking Algebra 1 in eighth or even seventh grade – something ...

In the fall of 2019, four high schools in a San Francisco Bay Area district shook up many of their ninth grade math classes. Students had traditionally been separated into more than five math courses ...

But if the heterogeneous class avoided those pitfalls, the new math placement would give hundreds of students with low test scores in seventh and eighth grades ... in the mixed class passed the ninth ...