Once Sanaa Hiremath, 11, was home schooled, she found she could do math without writing problems down. She has a Guinness World Record, finishing a 12-digit multiplication problem in under 10 minutes.

Across the country, states are passing new laws aimed at improving math teaching—mandating that schools intervene early to ...

The employment future looks bright for people with strong math skills. But among the nation’s K-12 students, that represents a small and dwindling demographic. What’s to blame for students’ poor math ...