This study investigated the mediating effect of teachers'skill flexibility (the mastery and utilization of various skills) on the relationship between holding multiple roles (extrateaching school roles) and work attitudes (burnout, tendency to quit, and organizational commitment). In this study, skill flexibility was composed of three components: skill utilization, skill variety, and multiskilling orientation. SEM path analysis revealed that skill utilization mediated the effect of holding multiple roles on all three work attitudes, and skill variety mediated the effect of holding multiple roles on burnout. Multiskilling orientation added little explanation to the final model. Skill flexibility components also mediated the effects of demographic variables (age, education, nationality, and school size) on all three work attitudes. These results contribute to the conceptualization of skill flexibility, which has been relatively underresearched in the organizational literature. Implications for teachers' work design are discussed.Oneofthemostnotedchallengestoorganizationsinrecentyearshasbeen how to adjust to the rapid pace of change. Environmental changes in consumer tastes and demands, legal requirements, demographic mobility, technological development, and economic fluctuations all call for constant organizational learning and adjustment in order to survive. In educational systems, schools are continuously undergoing changes in areas such as learning technology, social integration, and organizational structures (Levin, 1993). To help schools adjust to such changes, teachers often take on new roles and need to constantly acquire and utilize new skills-in short, to be 684