Professor of Human Development, Department of Human Development, Learning, and Quantitative Methodology, University of Maryland; Editor, Educational Psychologist; Author, "Peer relationships, motivation, and academic performance at school" (2017, Handbook of Competence and Motivation 2nd edition) and "Competence Within Context: Implications for the Development of Positive Student Identities and Motivation at School" (2015, Self-concept, Motivation and Identity: Underpinning Success With Research and Practice. International Advances in Self research); Co-Author, “Peer and Teacher Supports in Relation to Motivation and Effort: A Multi-level Study” (2017, Contemporary Educational Psychology), Handbook of Motivation at School (2016, 2nd edition) and Social Influences on Social-Emotional, Motivation, and Cognitive Outcomes in School Contexts (2016)