How do the highest-achieving school systems in the world develop their teachers? To prepare students for an evolving and increasingly interconnected world, a growing number of countries have remodeled their education systems to deliver an education built for the 21st century, producing higher achievement and greater equity than the U.S. With the support of the Center on International Benchmarking at the National Center on Education and the Economy (NCEE), and the Ford Foundation, the Stanford Center for Opportunity Policy in Education (SCOPE) drew together a global team of education researchers in the three-year study, producing unparalleled insights for U.S. educators, researchers, and policymakers. The result is the International Teacher Policy Study (ITPS). The study reveals key answers to the central question of how other countries have surpassed the U.S. in preparing their students to compete in the 21st century global economy. […] The study produced five policy briefs to summarize each of the identified strategy components used in high-performing countries to ensure all students have high-quality professional teachers. The brief Teacher Appraisal and Feedback – How do high-performing education systems appraise teachers and provide feedback to support continually improving performance?