Banner image for O E R in Mathematics Professional Development Project

A free and open set of professional development resources for learning and teaching mathematics.


Project Overview

Project Partners

What is OER?

Curriculum, Assessment, & Instruction

Project Resources


OER for Mathematics

What is OER?


In 2002 at a meeting sponsored by the William and Flora Hewlett Foundation at the United Nations Educational Scientific and Cultural Organization (UNESCO) conference, the term “open educational resources” was first coined and was defined by participants as “the open provision of educational resources, enabled by information and communication technologies, for consultation, use and adaptation by a community of users for non-commercial purposes” (Geith & Vignare, 2008, p.2).

According to the William and Flora Hewlett Foundation website:

“Open Educational Resources (OER) are high-quality, openly licensed educational materials that offer an extraordinary opportunity for people everywhere to share, use, and reuse knowledge. It also demonstrates great potential as a mechanism for instructional innovation as networks of teachers and learners share best practices.” (William & Flora Hewlett Foundation, 2010;

According to Wikipedia:

“Open educational resources are educational materials and resources offered freely and openly for anyone to use and under some licenses to re-mix, improve and redistribute.

Open educational resources include:

  (Wikipedia, 2010;

Composing free and open online educational resources


All links in this site have been checked; however, the Web is an ever-changing medium, and at times links can go down without our noticing. If you find a broken link WITHIN a reading or resource, only the owners of the website or article where the link is found can repair their own internal links. Report broken links on this Web page.

This resource was collaboratively designed by OER in Mathematics Professional Development Project partners from Maine RSU#54 & RSU#11 and staff from Education Development Center, Inc. This work is licensed under the Creative Commons Attribution-Non Commercial-Share Alike 3.0 License.