Lunch Barcodes Printing Lunch Barcodes Teachers are able to print lunch barcodes for their students using the Rostering Portal available in ClassLink. Click on the Rostering Portal in ClassLink. (Alternatively, go to https://rostering.princetonisd.net and click Sign In with ClassLink) Select the students you want to print using the check boxes on the left. To select all students, click the check box on the header row. Click the purple barcode button at the top of the table A PDF will be generated which can then be printed, cut, and laminated.