Barnum, M. (2019, March 10). A new study says textbooks might not be key to boosting student learning. Retrieved March 13, 2019.

Curriculum materials were not a major factor in elementary-school math achievement, according to an analysis funded in part by the Bill & Melinda Gates Foundation. The study focused on the 15 most common curricula in Washington, New Mexico, New Jersey, Maryland, Louisiana and California.