Professional learning communities (PLCs) are increasingly providing opportunities for school teachers to collaborate in order to develop shared beliefs about learning. Five key characteristics ensure the PLC's effectiveness. A PLC requires collaboration and a learning culture of trust among teachers. A goal-oriented plan is needed that involves data-driven conversations while ensuring that students remain the focus of the PLC's work to benefit all learners. A trustworthy leader is required to support teachers with challenges and successes along the journey together. With a focus on student achievement, PLCs can provide a school with significant gains in student growth.