The CK-12 Foundation is a California-based non-profit organization which aims to increase access to low-cost K-12 education in the United States and abroad. CK-12 provides free and customizable K-12 open educational resources aligned to state curriculum standards.

https://www.ck12.org/teacher/

Suggested Grade Levels: K, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

Contributor: N. Carbonell

OpenSciEd classroom materials are developed, field-tested, and revised in tandem with professional learning materials to support teachers in the enactment of high quality science learning for all students.

https://www.openscied.org/

Suggested Content Areas: K, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

Contributor: N. Carbonell

Get activities, games and SMART Notebook lessons created by teachers for teachers

https://exchange.smarttech-prod.com/

Suggested Content Areas: PK, K, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

Contributor: N. Carbonell