Energy costs are a school district's second highest expenditure after personnel. Public schools currently spend more than $8 billion per year for energy. School energy expenditures rose, on average, 20 percent per year between 2000 and 2002--and the costs continue to rise. Natural gas prices alone increased 14 percent annually between 2003 and 2006. Improving a school's energy efficiency doesn't have to cost millions. In fact, schools can cut their energy expenses by 5 to 20 percent simply by efficiently managing and operating physical plants. This holds true regardless of the age of a school building. This paper offers tips for improving a school's energy efficiency.