This book will help school systems improve their teacher workforce by drawing important lessons from nations with high-performing educational systems, as well as from successful state experiments in the United States. The authors examine common features and differences in the approaches of high-performing systems that made education a top priority and developed high-leverage strategies to meet their goals. Their varied solutions offer valuable ideas for how to create a strong teacher and school administrator corps from recruitment and preparation through induction, professional development, evaluation, and career advancement into leadership roles. Chapters focusing on systems in Finland, Ontario, and Singapore are coauthored by local scholars with extensive knowledge of the history and current status of policy and practice in their nation. A final chapter highlights attributes that are absolutely necessary for any education system to flourish. The book will be useful to policymakers, practitioners, and researchers interested in strengthening the quality of teaching.