The present study was aimed at investigating the relationships between students' perceived classroom achievement goals, school engagement and substance use in terms of smoking and drinking, and at investigating gender differences regarding these issues in a sample of 1,239 Norwegian 10 th grade students. A multivariate analysis showed that motivational and affective school engagement was predicted primarily by the students' perception of a mastery goal structure. However, motivational engagement was significantly more strongly predicted by achievement goal structures among boys than girls, in particular by mastery goal structure. The results also showed that school engagement, particularly motivational engagement, was negatively related to substance use. In conclusion, school engagement seems to be an important multi-dimensional indicator of motivation which is related both to perceived classroom goal structure and to students' substance use in terms of smoking and drinking. Despite the correlational design of the present study, it is reasonable to advise the promotion of a mastery goal structure in the classroom.Keywords: Classroom achievement goal structure, school engagement, substance use, gender differences, motivation
INTRODUCTIONSchool engagement has emerged as an important indicator of adjustment to life among adolescents (Archambault, Janosz, Fallu, & Pagani, 2009). Whereas students with a high level of school engagement are generally more successful at school, disengaged students are more likely to perform poorly and to exhibit problem behavior (SimonsMorton, 2004;Wang & Holcombe, 2010). For example, lack of school engagement among adolescents may increase the risk of school dropout, substance use (e.g., smoking and drinking), teenage pregnancy, and criminal activity (Blondal & Adalbjarnardottir, 2012;Caraway, Tucker, Reinke, & Hall, 2003;Sagatun, Heyerdahl, Wentzel-Larsen, & Lien, 2014). From a health perspective, a major objective is preventing adolescents from initiating substance use because this is a risk factor for subsequent substance use (Simons-Morton, 2004).Given that there is a relationship between school engagement and substance use, it would appear important to investigate factors in schools and classrooms that may be associated with the students' level of school engagement (Lam et al., 2014). For example, previous research has shown that students' school engagement may be accounted for by how they experience the learning climate at school, in particular by the classroom achievement goal structure q Å ge Diseth and Oddrun Samdal This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The moral rights of the named author(s) have been asserted.Correspondence should be addressed to Å ge Diseth, Department of Education, University of Bergen, Christiesgate 13, 5020 Bergen, Norway....