Turn off idle PC's.
This saves energy and will not harm the hard drives (unless done at a frequency of every five minutes or less). Don't turn on computers until they are needed, especially in the morning. Turn them off when attending meetings, at lunchtime, and always at the end of the day.

Turn the monitors off.
Screen savers do not save energy. Even if networking prevents shutting down the PC itself (if it is a server), just turning off the monitor will save 30-60% of computer energy consumption. Don't forget to shut the monitor off at day's end!

Turn printers off.
Idle printers, especially lasers, draw significant amounts of power. If possible, turn them off while preparing materials, attending meetings, at lunchtime, and always at the end of the day.

Edit on the screen.
Save printing and paper energy by editing on the screen rather than on hard copies.

Use inkjet printers.
Inkjets use just 5% of the energy of lasers For drafts or interoffice documents, use the inkjet. and save laser use for presentation materials. Turn off the laser printer between uses.

Don't print or copy unless you have to.
Send e-mail or put files for groups of teachers in the Common Folder on the network. When delivery of hard copy is not essential, don't print it!

Thanks to the staff at the Peninsula (WA) School District for providing such useful information for schools!