Open education resource platforms

Groups of instructional and informational modules structured into books or course notes. 

Open source of images and other creative content for reuse 

Enormous archive of learning materials include courses, lesson plans, images, videos, syllabi, quizzes, exams, and textbooks.

Massachusetts Institute of Technology (MIT) open resources 

Large OER platform with materials relevant for K-12 and beyond 

Peer-reviewed texts written by professional content developers.

A collection of free and open textbooks from colleges, governmental agencies, education non-profits, and other education-related organizations

Full curriculums with necessary resources.  A one stop shop.