For students to learn, they must be present and engaged in school. As a result, absenteeism is a concern for all schools. Poor attendance is associated with a host of negative short- and long-term outcomes, such as academic failure, disengagement, leaving school, and problem behaviors in school and community. Despite the challenges, evidence suggests that even small changes in attendance are related to meaningful outcomes for students This brief provides guidance for schools or districts looking to integrate strategies for improving attendance within the Positive Behavioral Interventions and Supports (PBIS) framework. [For "Improving Attendance in a Remote Learning Environment," see ED609390.]