What are some possible areas in the home and the school where energy can be easily reduced

HOME -
>Minimize Phantom Loads
>Use renewable sources of energy instead of non-renewable ones. 
>Unplugging devices when they’re not in use is a simple way to cut your energy costs.
>Use More Energy-efficient Appliances
>Change Your Light Bulbs
>Use Fans for Cooling
>Plug multiple electronic devices that consume energy when off into a power strip so you can turn them all off easily when you are not using them.
>Switch to eco-friendly energy.
>Use greenhouse or fan heaters instead of radiators (central heating). 
>Drying clothes by spinning is 20 times less energy intensive than drying them with heat in a clothes dryer.
>Turning down the thermostat by just 1°C in winter can save up to 10% per year on heating bills.
>Compact fluorescent lamps use only around 25% of the electricity as traditional light bulbs to provide the same light. And, they can save up to 80% on your next electric bill and last up to 8 times longer.

SCHOOL -
>Switch off the lights and other appliances-Classrooms use a lot of energy in lighting. When you are out of the room make sure the lights are switched off. You can often leave the lights off during the day if there is enough natural light through the windows or you are doing an activity that does require the extra lighting, such as story time. If you have DVD players or computers in the room make sure they are completely turned off when not in use. 
>Reduce the operating time of the pool filter and automatic cleaning sweep to four to five hours, and only during off-peak time.
( you can use some points from the home area too )

And a) oxygen i believe