“…Originally described by Barrish, Saunders, and Wolf (1969), the GBG is a class-wide interdependent group contingency in which (a) classroom rules are developed, (b) students are assigned to teams and monitored for rule violations, (c) teams are given demerits if any student on the team violates a rule, and (d) rewards are provided to all students on the team if the team scores below a predetermined demerit limit. The GBG has been successfully implemented across a range of student ages from kindergarten (Donaldson, Vollmer, Krous, Downs, & Berard, 2011) to high school (Flower, McKenna, Bunuan, Muething, & Vega, 2014;Kleinman & Saigh, 2011;Salend, Reynolds, & Coyle, 1989;Tingstrom et al, 2006), and in a variety of school settings, including general education classrooms (Barrish et al, 1969;Pennington & McComas, 2017), special education classrooms (Breeman et al, 2015;Gresham & Gresham, 1982;Groves & Austin, 2017;Joslyn, Vollmer, & Hernández, 2014), libraries (Fishbein & Wasik, 1981), cafeterias (McCurdy, Lannie, & Barnabas, 2009), and recreational facilities (Galbraith & Normand, 2017). In addition, longitudinal studies have indicated that the GBG could have long-term effects on students, such as reduced rates of substance-use disorders, smoking, antisocial behavior, incarceration, suicidal ideation, and use of mental health services at the ages of 19-21 (Kellam et al, 2011).…”