Open Educational Resources (OER) are learning, teaching and research materials in any format and medium that reside in the public domain or are under copyright that have been released under an open license, that permit no-cost access, re-use, re-purpose, adaptation and redistribution by others. 

OER Commons https://www.oercommons.org/authoring-overview

Open Education has never been easier

Creating with Open Author

Create OER with Open Author

Open Author helps you build and publish Open Educational Resources for you and for the benefit of educators and learners everywhere.

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Edit Lesson | OER Commons 

https://www.oercommons.org/courseware/lesson/100575/edit 

Learn more about creating OER 

 We have used the Following Resource to Create Open Educational Resources

Edit Lesson | OER Commons 

https://www.oercommons.org/courseware/lesson/100575/edit

Search Results : Search Results : OER Commons 

https://www.oercommons.org/browse?batch_size=20&sort_by=title&view_mode=summary&f.general_subject=education&f.general_subject=computer-science