The popular language learning app is betting that its gems, streaks and leaderboards will teach elementary school children—and adults—basic math.

Math educators share their favorite lessons, including taking students for a walk around a fenced-in field, investigating student-loan costs, and working alongside a language arts teacher.

Duolingo, a quick-and-easy learning app that boasts more than 128 million monthly active users worldwide — mostly for its ...

Teaching Common Core math: Most elementary school teachers did not learn math this way, and many now struggle to teach to the new standards.

A new study finds that Houghton Mifflin California Math produced larger achievement gains than any other textbook.

That has consequences. Early math skills are associated with higher literacy and higher earnings. But many elementary school teachers are uncomfortable with math — in a way that can pass on to ...