The document discusses open textbooks and Wikipedia as a potential source of open educational resources. It notes that while textbooks have long been used in education, they require significant time and resources to produce. Wikipedia offers a tool called Book Creator that allows articles to be compiled into a single open textbook. This makes Wikipedia a large repository of potential open learning objects that can be easily adapted into open textbooks. However, some argue that disparate Wikipedia articles may not flow well together, but the document counters that within subject areas articles are often written cohesively and take a neutral point of view.