Open educational resources (OER) promote the creation and dissemination of subject-specific content in ways that reflect current teaching and learning modalities. Learners' levels in the following resources cover the P-20+ range of formal learning, as well as lifelong learning.
In selecting these OER, the following criteria were considered:
Quality of content
Ease of use
Freedom from (hidden) cost
Additions to the list of OER will attempt to abide by these considerations.