Most people are familiar with snow and rain as reasons to cancel recess. But what about canceling recess because it’s too sunny? Playgrounds in California are heating up. And with asphalt blacktops and metal monkey bars, kids are forced to skip outdoor activities to avoid getting burned on school yards that can reach up to 140 degrees. One solution to this problem is to green schoolyards by adding trees, gardens, and other vegetation. Green schoolyards not only help reduce heat island effects but also provide a wealth of educational opportunities. By using the schoolyard as a 3D textbook, students can learn about climate change, sustainability, and other academic topics through hands-on experiences. For example, students can learn about water conservation by monitoring rain gardens or composting food waste in the school garden. Additionally, green schoolyards can provide a safe and stimulating environment for students to learn, play, and connect with nature, promoting mental and physical health.