What makes a school “sustainable”? In one respect, it means that the school is durable, that it will last and not become a heap of landfill waste in a generation or two. On the other hand, it means that the school can keep operating without damaging the ecosystems that provide the school with water, energy and food. In some ways, “sustainability” has become so over-used that the term can lose its meaning and power to drive good decisions. But when it comes to schools, we know that society will benefit when we have healthy places to pass knowledge and a thirst for learning on to future generations, and because of that, it is imperative that our schools – and all the wonderful things that happen in them – can be sustained.