South Korea-based design studio ID+IM has drawn up an environmentally friendly and cost-effective way to bring classrooms to children in developing areas. Called Boxchool, the concept project recycles unwanted shipping containers into modular structures that have been designed for education. Each truck-delivered Boxchool is assembled on-site and comes with its own furniture, solar panels and rain-water filtration system to provide clean drinking water to kids. Three units can form a playground while six can provide enough space for a library. View the full concept on Yanko Design.