This resource from the Learning Policy Institute discusses how performance assessments provide students with authentic ways to develop and demonstrate learning. The tool describes how several schools, districts, and networks of schools are organizing teaching, learning, and assessment around coherent performance assessment systems. These systems leverage intentionally designed policies and systemic practices to provide students, educators, and leaders with sophisticated opportunities to develop and make visible student thinking, as well as the associated data systems and professional supports needed to ensure that all students are supported in mastering academic and 21st-century competencies. In these systems, real-world tasks and projects serve as student learning experiences.