What are OERs? Open educational resources (OERs) can range from textbooks to articles, assessments to study guides, provided that these teaching, learning, and research resources are available at no cost.
Why? Unlike traditional textbooks or library subscriptions, OERs are a particular type of open access information with the power to advance the common good of students through a reduction in costs associated with classroom learning.
Are they good? In terms of quality, OERs (including open textbooks) tend to be written by experts in their field, and they typically undergo peer review and/or professional editing. That being said, it is still important--as is the case with any publication--to assess the content for quality.
Brief history: Expanding access to resources for the common good has been at the core of the OER movement since 2002, when the term was coined at a UNESCO forum with a goal to “develop together a university educational resource available for the whole of humanity.”