Implementation fidelity and educational science : an introduction / Greg Roberts -- Features of fidelity in schools and classrooms : constructs and measurement / Frank M. Gresham -- A framework for incorporating intervention fidelity in educational evaluation studies / William M. Murrah, Jeff Kosovich, and Chris Hulleman -- Implementation fidelity : examples from the reading for understanding initiative / Greg Roberts, Nancy Scammacca Lewis, Anna Mari Fall, and Sharon R. Vaughn -- Intent-to-treat and treatment take-up effects of summer school on the literacy outcomes of struggling early readers / Keith Zvoch -- Linking implementation fidelity to impacts in an RCT / Fath Unlu, Laurie Bozzi, Carolyn Layzer, Arthur Smith, Cristofer Price, and Richard Hurtig -- Measuring treatment fidelity with reliability and validity across a program of intervention research : practical and theoretical considerations / Jill H. Allor and Lynne Stokes.