“…Research on GCAs such as the TGM provide evidence for the development of cognitive outcomes (i.e., tactical;Vande Broek, Boen, Claessens, Feys, & Ceux, 2011), affective outcomes (i.e., student motivation; Gray, Sproule, & Morgan, 2009) and psychomotor outcomes, particularly off-the-ball movement (Lee & Ward, 2009). More recently, however, a limited number of studies (Harvey, Smith, Fairclough, Savory, & Kerr, 2015;Harvey, Song, Baek & van der Mars, 2015;Miller et al, 2015Miller et al, , 2016Smith et al, 2015;Van Acker et al, 2010;Yelling et al, 2000) have begun to provide evidence that teachers' use of a GCA can afford students opportunities to engage in moderatevigorous physical activity (MVPA) for at least 50% of the lesson time, consistent with national recommendations (Association for Physical Education, AfPE, 2008;Institute of Medicine, IOM, 2013). This is particularly significant as it has been well documented that regular physical activity (PA) of at least a moderate intensity is related to an overall improvement in health and wellbeing along with a reduced risk of chronic diseases in children and young people (e.g.…”