“…Reinforcement rates. Math interspersing research has been plentiful since the mid-1990s (Billington & Skinner, 2002;Billington, & Skinner, 2006;Billington, Skinner, & Cruchon, 2004;Billington, Skinner, Hutchins et al, 2004;Calderhead, Filter, & Albin, 2006;Cates & Dalenberg, 2005;Cates & Skinner, 2000;Clark & Rhymer, 2003;Hawkins et al, 2005;Jaspers, Skinner, Williams, & Saecker, 2007;Johns, Skinner, & Nail, 2000;Logan & Skinner, 1998;McCurdy, Skinner, Grantham, Watson, & Hindman, 2001;McDonald & Ardoin, 2007;Montarello & Martens, 2005;Rhymer & Cates, 2006;Rhymer & Morgan, 2005;Robinson & Skinner, 2002;Skinner, 2002;Skinner, Fletcher, Wildmon, & Belfiore, 1996;Skinner, Hurst, Teeple, & Meadows, 2002;Skinner, Pappas, & Davis, 2005;Skinner, Robinson et al, 1996;Wildmon, Skinner, McCurdy, & Sims, 1999;Wildmon, Skinner, & McDade, 1998;Wildmon et al, 2004;see Cates, 2005 for a review). These procedures typically include presenting students with one or more math assignment pairs,…”