Open access (OA) refers to online research outputs that are free of all restrictions on access (pay access) and free of many restrictions on use (copyright or license agreement)
Goal of Open Access is the free, immediate, online availability of research articles coupled with the right to use these articles fully in the digital environment. Open Access ensures that anyone can access and use the results - to turn ideas into industries and breakthroughs into better lives. From the SPARC website https://sparcopen.org/open-access/
By definition, all OERs are Open Access, but not all Open-Access materials qualify as OERs.
Sometimes the distinction may not matter: You may simply want to link to a video or exercise in your course, and an item may allow that without allowing all 5 R's of a true OER.
Always pay attention to the licensing of the specific material you want to use to determine whether your desired use is permitted.
S.B. No. 810, "An Act relating to the use of open educational resources," was signed into law in Texas in early June 2017. (See the history of this bill's passage)
This legislation increases transparency about textbook costs (including the adoption of no-cost textbooks) and allows students to make more informed course selections based on this information.
This bill amends the Education Code to require, among other things:
Similar legislation has previously been passed in other states as well.
One of the leading educators in the OER movement sets out the rationale for open education. (TEDxNYED, Mar. 2010)