Leaders' self-efficacy has recently been identified as a critical component in the success of educational reform. In educational policy and leadership, little attention has been paid to leaders' self-efficacy beliefs as they go about the implementation of Common Core State Standards (CCSS). This study seeks to understand leaders' CCSS self-efficacy by examining the level of CCSS-focused engagement and the degree of leaders' network connectedness from a social learning perspective. Findings suggest leaders who report higher levels of CCSS-focused engagement tend to be more efficacious about implementing CCSS. Such a relationship is mediated by leaders' social network position in providing CCSS advice and work effort recognition to their fellow administrators.