LibreTexts(LibreTexts) Libraries include Biology, Business, Chemistry, Engineering, Geosciences, Humanities, K12 Education, Mathematics, Medicine, Physics, Social Sciences, Spanish, Statistics, and Workforce. The LibreTexts mission is to unite students, faculty and scholars in a cooperative effort to develop an easy-to-use online platform for the construction, customization, and dissemination of open educational resources (OER) to reduce the burdens of unreasonable textbook costs to our students and society.