Open educational resources are educational materials and resources offered freely and openly for anyone and available under a license that allows users to retain, reuse, revise, remix, and redistribute.
Open Educational Resources (OER) are teaching and learning materials that you may freely use and reuse, without charge. That means they have been authored or created by an individual or organization that chooses to retain few, if any, ownership rights. For some of these resources, that means you can download the resource and share it with colleagues and students. For others, it may be that you can download a resource, edit it in some way, and then re-post it as a remixed work. OER often have a Creative Commons or GNU license that state specifically how the material may be used, reused, adapted, and shared. - OER Commons
Examples of OER
Learning content: full courses, course materials, modules, syllabi, activities, journals, etc.
Tools: Software to support the creation, delivery, use and improvement of open learning content including searching and organization of content, content and learning management systems, content development tools, and online learning communities.
Benefits of Creating and Using OER
improving student performance and satisfaction
increasing access to educational materials for a wider range of learners, predominantly those underserved by traditional educational opportunities
professional development through engaging in critical reflection of educational resources
helping students, districts, and educational institutions save money
wider visibility for pedagogical work
including more diverse perspectives and representation in educational materials
attracting informal learners and serving as a gateway from informal learning to formal educational programs