“…One research series (i.e., six, published single-case studies) showed that Numbered Heads Together (NHT), a cooperative learning structure, consistently increased student active engagement during group instruction and improved academic quiz performance by one to two letter grades over traditional hand-raising practices in elementary (Maheady, Mallette, Harper, & Sacca, 1991) and secondary (Maheady, Michielli-Pendl, Mallette, & Harper, 2002; McMillen et al, 2016) classrooms. Another research line (i.e., three published and two under review) found that a series of opaque jars used to randomize group contingency components (target behaviors, criteria, students, and/or consequences) improved homework completion and accuracy among students with and without disabilities (Ferneza, Jabot, & Maheady, 2013), increased student participation during group lessons (Maheady, Smith, & Jabot, 2013), and reduced high rates of disruptive behavior in an inclusive classroom (Maheady & Jabot, 2011).…”