Accessibility means that all students can learn from print and digital content, participate in all learning activities, and interact without hindrances. When creating OER, keep accessibility in mind and design highly-structured content using headings, subheadings, and descriptive links to make conversion to a screen reader possible.
The following resources can help you build accessible content:
Once an OER has been selected, the next step is to determine how it is licensed and what permissions you have. Please note that open licenses do not replace copyright. Instead, they change the default of "all rights reserved" to "some rights reserved", the terms of which can vary:
Creative Commons Attribution (CC BY) is the most common open license. It grants the rights to use, adapt, and distribute the material as long as the author is attributed.
Creative Commons Attribute ShareAlike (CC BY-SA) grants the rights to use, adapt, and distribute the material as long as the author is attributed and derivative versions use the same license.
Creative Commons Attribution NonCommercial ShareAlike (CC BY-NC-SA) grants the right to use, adapt, and distribute non-commercially as long as the author is attributed and any derivative versions use the same license.
Creative Commons Attribution NoDerivs (CC BY-ND) allows for redistribution, commercial and non-commercial, as long as it is passed along unchanged, with credit to the author.
A full list of the types of open licenses is on the Creative Commons webpage. 
Note that public domain dedications are not Creative Commons licenses; instead, these licenses wave all rights reserved by copyright to place the work in the public domain. Attribution is often appreciated but not necessary.
Source: “How to attribute Creative Commons Photos” 
by Foter. Licensed under a CC-BY-SA 3.0 license
