The document discusses the need to reinvent teaching to help students develop new skills required for work and citizenship in today's world. It argues that incremental change is not enough and that a new approach is needed to create a system for continuously improving instruction. This requires developing communities of practice where teachers collaborate to analyze problems, develop lessons together, and provide feedback to one another through observation. School leaders must model behaviors like seeking feedback and focus on improving teaching through asking thoughtful questions rather than just providing answers.