To start, create a text file (.txt extension) with the names of the students separated by carriage return.
In Windows, you can use NotePad.
With a Mac, you can use TextEdit: be sure to select 'Make Plain Text' from the format menu.
Then start iTunes, and click on the icon of your iPhone
Select 'Apps' from the left
Scroll to the bottom of the page (File Sharing):
Select PickAGuy in the apps list, then drop the file in the space to right.
Back in the app, in the 'Classes' view touch the + button and load the class from text file.