“…Ten studies were described as randomised or cluster-randomised controlled trials [36,[38][39][40][41][42][43][44][45][46][47] and four quasi-experimental trials [48][49][50][51]. Settings included kindergarten [40,41,47], childcare [43,46], preschool [38,39,44,45,[48][49][50], Head Start preschool or kindergarten (early childhood education services provided to low-income children and families in the United States) [35,42,44,45,47,51] and early school grades [40,44,47]. In most studies, control group children participated in a business-as-usual ECEC curriculum [n = 13,35,38,39,41,43,[44][45][46][47][48][49]...…”