You can search for Open Educational Resources in a variety of ways, either focusing your search on specific types of OER, or covering the entire spectrum. The four links below allow you to respectively search multidisciplinary OER, Open Educational Resource textbooks only, OpenCourseWare - aka entire classes (at a higher-education level), as well as a page that provides you with a number of tips and tricks for how to best search through the multitude of what is out there in the OER world!