In the United States, K–12 school buildings spend more than $8 billion each year on energy—more than they spend on computers and textbooks combined [i]. Most occupied older buildings demonstrate poor operational performance—for instance, more than 30 percent of schools were built before 1960, and 53 percent of public schools need to spend money on repairs, renovations, and modernization to ensure that the schools’ onsite buildings are in good overall condition. And among publ