Collective efficacy is the shared conviction that educators make a significant contribution in raising student achievement. It is a powerful belief system that results in more successful outcomes in schools because collective efficacy positively impacts teachers’ motivations, goals, and efforts. Teachers who believe that they can make a positive difference in the lives of students, regardless of the challenges posed by students’ home environments, not only get better results; they also have a greater sense of professional satisfaction and well-being. Therefore, fostering a sense of collective efficacy amongst a faculty is important for students and teachers alike. This guide is designed to help teachers and leaders better understand and reflect on the conditions that lead to a higher sense of efficacy in today’s schools.