“…Effi cacy of school-based programs that promote social and emotional skills is well established (Hutchings et al, 2012), also at a cross-cultural level (Kimber, Sandell, & Bremberg, 2008;Moreira, Crusellas, Sá, Gomes, & Matias, 2010;Ross, Sheard, Cheung, Elliott, & Slavin, 2011), as revealed by several meta-analyses (e.g., Diekstra, Sklad, Gravesteijn, Ben, & Ritter, 2008;Durlak, Weissberg, & Pachan, 2010;Frey, Nolen, van Schoiack, & Hirschstein, 2005).…”