We offer a real-life case study of how one teacher approached an aspect of this issue--selection of the most appropriate reading text for her students. By using most of the ten suggestions that follow the case study, this teacher did manage to avoid being tyrannized by readability formulas.
Davenport, B. M., & Phillips, J. F. (1986). How to Avoid Being Tyrannized by Readability Formulas. Reading Horizons, 26 (3). Retrieved from http://scholarworks.wmich.edu/reading_horizons/vol26/iss3/8