This document discusses open educational resources (OER) in philosophy. It defines OER as educational materials that are in the public domain or available with an open license, allowing anyone to legally copy, use, adapt and share them. The document notes rising textbook costs as a key issue that OER aims to address through improving access and allowing customization. It provides examples of OER that can be used in philosophy, such as open textbooks and logic materials. Challenges of finding and implementing high-quality OER are also acknowledged.