As school starts up again, LISD is making the push to be energy-efficient and save the district money. The district usually has about a $4 million energy bill every year, but last school year, they saved money. LISD officials say it had to do with the mild temperatures last summer, and many of the schools using energy-management systems. At Centennial Elementary, they have energy efficient lighting and air conditioning, as well as classroom motion sensors, ensuring that the lights go out when no ones around. Says Centennial principal Glen Teal, "We look for opportunities at the campus level to conserve energy as much as possible just because its right thing to do and it does save dollars which we need desperately right now in our district."