Open-licensed learning materials have generally been slower to carve out a spot in the K-12 market they have in higher education, where companies like Lumen Learning have found target demographics.

Want to learn more? Sign up for a free five-week email mini-course full of research-backed strategies to help students make sense of math. In Sarah Cuddihy’s 1st grade class at Driscoll School here, ...

It’s possible to quantify a lot of things about the U.S. education system, but there’s one stat that remains notoriously elusive: what materials teachers are using in their classrooms. There’s little ...