Boyd, Jade. (2016, September 27). More than 1.5 million students have used OpenStax’s free textbooks. Retrieved from http://news.rice.edu/2016/09/27/more-than-1-5-million-students-have-used-openstaxs-free-textbooks-2.

OpenStax reports that 1.5 million college students have used a free OpenStax textbook and estimates it will save students $70 million in the 2016/17 academic year.