Explore the powerful synergy between your credibility with students and your collective efficacy as a member of a team. When you increase your credibility with students, student motivation rises. And when you partner with other teachers to achieve this, students learn more. This one-stop resource illuminates the connection between teacher credibility and collective efficacy and offers specific actions educators can take to improve both. It includes tips for becoming more trustworthy, competent, and responsive in the eyes of students; tools for teams to use to polish their collective effectiveness through better communication and problem-solving; and coaching videos that challenge teachers to improve teacher practice and grow professionally.