At school you can use Mobility Print. As long as you are at Potomac Falls & linked to the LCPS-secure wireless, you'll be able to send something to the printer. The only printer set up for students is the black & white copier in the library.
The first time students print, they need to exit out of the print screen and re-queue the job while in the library. Once they have printed, they don't need to go through that process again.
NOTE: Document will print TWO-SIDED unless you click More settings and uncheck Two-sided
If you have a printer at home, you may be able to set up your Chromebook to print to it. You'll be using Cloud Printing. The printer must be cloud-ready and connected to wifi. Here are instructions.