The document is a guide by Henry Trotter on finding open educational resources (OER), detailing various methods for searching through general and specialized search engines, directories, and platforms for educational materials. It provides links to resources for categories such as images, videos, audio, textbooks, and complete courses, alongside information on specific platforms like OER Commons, MIT OpenCourseWare, and Khan Academy. The document is licensed under a Creative Commons Attribution 4.0 International License.