Unplug your devices
Chances are your kids won't be using all their electronics while they're away at school. Unplug and power off your unused electronics to stop them from using "vampire energy." Vampire energy is energy that are not used from plugs, chargers, and electronics while still being plugged in.
Adjust your thermostat
With kids away at school, you will have fewer warm bodies to keep cool. There is no need to blast the air conditioner, even if it's still hot outside. Adjust your thermostat a few degrees higher, and keep in mind, you can save 4% to 8% on cooling costs for each degree raised.
Keep busy after school
Instead of having your bored kids play on their electronics, keep your kids out of the house by encouraging after-school activities. If your children are occupied with sports, music lessons, and clubs, you can save money during the expensive hours of peak energy demand.