“…Blozowich, 2001;Brimijoin, 2002;Johnsen, 2003;Smit & Humpert, 2012;Tomlinson, 2001), or on specific groups of learners, gifted students and students with disabilities (Baumgartner, Lipowski, & Rush, 2003;Geisler, Hessler, Gardner, & Lovelace, 2009;Jones, Yssel, & Grant, 2012;McQuarrie, McRae, & Stack-Cutler, 2008;Rock, Gregg, Ellis, & Gable, 2008;Tieso, 2005). Despite the fact that there are studies documenting the positive effect that differentiation has on student learning in mixed ability classrooms (i.e.…”