In 2002, The Hewlett Foundation began investing in Open Educational Resources (OER)—high quality teaching, learning, and research resources that are free for others to use and re-purpose. OER presented an extraordinary opportunity for increasing access to education, sharing knowledge, fostering instructional innovation, and supporting personalized learning. The widespread use of OER would empower educators to tailor instruction and enable students to make meaningful choices about their own education while dramatically lowering the cost of instructional materials