An interactive open-source calculus textbook is compared to a popular commercial textbook. Structured as a non-inferiority study, use of the open-source textbook does not harm student outcomes, and there is evidence that the open-source textbook is better than the commercial textbook in promoting post-course enjoyment of mathematics and confidence…

The authors evaluated principles of macroeconomics textbooks for readability using Coh-Metrix, a computational linguistics tool. Additionally, they conducted an experiment on Amazon's Mechanical Turk Web site in which participants ranked the readability of text samples. There was a wide range of scores on readability indexes both among…

To aid secondary school and college level economics teachers as they select textbooks for introductory economics courses, this article recounts how teachers can use the Flesch Reading Ease Test to measure readability. Data are presented on application of the Flesch Reading Ease Test to 15 introductory economics textbooks. (Author/DB)