Contact sheets are a great holdover from the days of film photography, when you wanted a big overview of all the shots on a strip of film. After developing the film, you could just lay a sheet of photo paper under the enlarger, lay your strips of film on top, put a glass plate over the whole thing to hold them down, and then expose with white light for a small amount of time.
This would produce a single sheet with all your images as thumbnails:
Printing Digital Contact Sheets
Open the folder with your name on it in the Digital Photo Thomas folder found on the desktop
Open the specific folder for that set of Photos (Abstraction, Chicago Field Trip, etc.)
Click the pictures you want to print as thumbnails. (To select more than one, hold down the Ctrl key as you click on them)
On the toolbar, click Share and then Print.
In the Print Pictures dialog box, select the printer (E-RM021-CLR-01), paper size (letter), and scroll down and then click Contact sheet in the list of print sizes.
Click Print to start printing.
Put your name on it, and circle the photos you believe are the best to edit.