Open educational resources
The quality and breadth of Open Education Resources (OER) texts have improved greatly, especially for lower-division courses where there is a larger audience and the content is less specialized. Studies show that the savings to students can be substantial; on average about $100 per course. Faculty who have made the switch are generally satisfied with the content, and studies comparing student success with OER texts as opposed to publisher content show no significant difference in performance.
If you’re interested but would like to evaluate open content on your own before taking the next step, take a look at the OpenStax offerings and review the selected readings below.