Open Educational Resources (OERs) are resources that are shared publicly, typically online, that can be used by educators. OERs can appear in several different formats, such as PowerPoints, worksheets, and quizzes. These resources can be used as they were created, edited, or added to other resources as the user chooses. The link below is an article entitled "Recognizing and Overcoming Obstacles: What it Will Take to Realize the Potential of OER". This article discusses what OERs are and their endless benefits when used within the classroom. OER allows students and teachers to save money on teaching and learning resources, allows immediate access to the material, and allows for differentiation to benefit the students. This article then goes on to discuss the potential reasons why OERs are not used more often including a lack of technological access and concerns about quality. These issues are discussed in detail along with possible solutions to each obstacle. Definitely check