Any explication of the essential components of an effective reading program will likely include a discussion of the teacher's role. Research findings have made it abundantly clear that the single most important element of an effective reading program is the regular classroom teacher. Many other factors are important, of course, but these research findings suggest pupil success or failure is most directly related to the "teacher variable" in the teaching of reading.
Harste, J. C. (1977). Understanding the Hypothesis, It's the Teacher that Makes the Difference: Part I. Reading Horizons: A Journal of Literacy and Language Arts, 18 (1). Retrieved from https://scholarworks.wmich.edu/reading_horizons/vol18/iss1/6