Dripping water faucets are costly in water and energy use. Water pressure regulators on hot water lines to reduce wasted hot water. In some areas you will pay more for the electricity used by some refrigerator models during their lifetimes than you paid for the refrigerator. You can work with vendors to find the availability and cost of alternative models. In an experiment, cooking the same recipes in the same kitchen with the same utensils, some cooks used twice as much energy as others.
Some schools have a laundry.
If so, this can present opportunities for savings. This saves hot water and electricity. Many items can be washed in cool water and almost everything can be rinsed in cold water. Warming up a clothes dryer takes energy. Save energy by drying loads one right after another without letting the dryer cool off.