The Hasbrouck & Tindal (1992, 2006, 2017) norms revolutionized American education. These norms have helped us to understand the importance of reading fluency. https://files.eric.ed.gov/fulltext/ED594994.pdf
Check out Dr. Hasbrouck's & Dr. Glaser's book: https://www.benchmarkeducation.com/y35121-reading-fluency-understand-25e2-2580-2593-assess-25e2-2580-2593-teach-professional-learni.html
Dr. Tindal's & Dr. Marston's book: Classroom Based Assessment: https://a.co/d/dT7oIom
Educational Diagnosticians