“…The use of manipulatives (first physical manipulatives, now virtual manipulatives) has a long historical trajectory leading to their prevalence and use in mathematics classrooms today. The research has a 40-year history (Fuson & Briars, 1990;Moyer, 2001;Moyer & Jones, 2004;Parham, 1983;Prigge, 1978;Raphael & Wahlstrom, 1989;Sowell, 1989;Suydam, 1985;Suydam & Higgins, 1977;Thompson, 1992;Uribe-Florez & Wilkins, 2010). Studies of virtual manipulatives began over 25 years ago with the first computer-based manipulatives (Berlin & White, 1986;Clements & Battista, 1989;Clements & Sarama, 2007;Moreno & Mayer, 1999;Moyer-Packenham & Westenskow, 2012;Reimer & Moyer, 2005;Thompson, 1985).…”