The Green Schools Investment Guide offers school leaders, policymakers, and advocates a compelling case for investing in sustainable infrastructure. The guide demonstrates how green school buildings—featuring energy-efficient systems, improved air quality, and thoughtful design—can positively impact student health, academic achievement, and staff productivity, while simultaneously lowering operational costs and reducing environmental impact. Through practical strategies, financing options, and data-driven insights, the guide supports decision-making for energy upgrades, building renovations, and new construction projects. By emphasizing the importance of equity and long-term resilience, the guide provides a roadmap for creating healthier, more cost-effective school environments that are better equipped to adapt to future challenges and meet the evolving needs of students and staff.