With the guidance of teachers, students use self- and peer assessments to develop abilities to monitor their own progress, distinguish between high quality and low-quality products, and provide others with useful feedback and support. The discourse among students elevates what students expect of themselves and fosters a share value of learning. These skills, practices, and values sustain high quality efforts outside of school and over a lifetime. Similarly, when teachers share their instructional goals and plans, observe each other’s practice, and support each other’s professional development efforts, they create an expectation of high-quality teaching and it becomes a core value of the school. Used in this way, assessment reforms improve both teacher performance and student learning.