With energy prices escalating, schools and universities have enormous incentive to control heating and cooling costs. And, as concerns about campus security and student safety continue to be paramount, education administrators have a duty to make sure their facilities are protected from intruders, vandals or other criminals. At the same time, school facility managers must stay focused on their core mission: providing high-quality learning environments. One step that can be taken to ensure that facilities are secure, energy-efficient spaces that are conducive to learning is to have properly functioning, well-maintained doors and windows. Properly installed doors and windows can prevent unwanted people from entering a building; they also can keep out unwanted natural elements--cold, heat, rain, snow and noise. Well-placed windows can provide the right amount of natural light that can enhance student performance, as well as reduce the reliance on artificial light.