On RussianMathTutors.com, a site promoting a Soviet-era style of math instruction, a sample question involves Masha, a mom who bakes a batch of unmarked pies: three rice, three bean and three cherry.

A Russian mathematician has developed a new method for analyzing a class of equations that underpin models in physics and economics and have challenged researchers for nearly two centuries.

Across California, after-school academic programs are experiencing a boom as parents look for ways to boost their children’s learning beyond the classroom. Among the most popular options, the debate ...