Most school systems require the principal of a building to make judgments about the quality of each teacher's instructional program as part of a process of rating teachers. Since reading instruction is generally conceded to be the most important part of the elementary school curriculum, there is frequently concern for evaluation of that component of the school program.
McCormick, S. (1979). Aid for the School Principle: Evaluate Classroom Reading Programs. Reading Horizons, 19 (2). Retrieved from https://scholarworks.wmich.edu/reading_horizons/vol19/iss2/7