There are plenty of places to search for material. Below are some suggestions (some of which you know already).
Be careful, however, that you make sure that what you choose is available open source because some of them have a “mix” of commercial, proprietary, and open source.
[NOTE: If you have other good sources, please add them or let me know and I’ll add them. Aline]
What to do
There are a number of places to help you understand the developing field of alternative resources and help you to create your textbook. California State University has built a web site that gathers together many, many resources to explore. It is called Affordable Learning Solutions. See http://als.csuprojects.org/ for an extensive array of links to free course materials and courses, free eTextbooks, Library Resources, and useful tools.
MERLOT, for example, is the California State University initiated source for learning objects. MERLOT is also one member of the College Open Textbook Collaborative. If you go to the Collaborative web page, you will see that it includes community colleges, four year universities, Rice University, Carnegie Mellon University, and many others.
- Free Digital Textbook Initiative (California Resource Learning Network) According to Felipe Razo, who provided this suggestion, this initiative used Flexbooks.
- Google Books
- Google eBooks
- The catalog of open-license textbooks contains more examples of high-quality, lower-cost options
- Individual titles:
- Introduction to Psychology by Stangor is an example of an open textbook, which can be freely accessed online, adapted, even purchased in bookstores at an affordable cost.
- MERLOT (Multimedia Educational Resource for Learning and Online Teaching) NOTE: This was started by CSU.
- Flickr (for images) NOTE: Please be sure that you restrict your searches to Creative Commons material that your are allowed to modify, adapt, or build upon.