Go to the Massachusetts Bay Transportation Authority (MBTA) website and click on the "Fares & Passes" tab across the top of the page.
Select the "Reload your CharlieCard" option on the left-hand menu.
Scroll halfway down the page and click on the "Add Stored Value" link.
Type your student CharlieCard serial number in the box provided and and re-type it to confirm. The serial number can be found on the front of your CharlieCard across the bottom edge and should have 11 digits. Click "Continue" to proceed.
Sign into your MBTA account and click "Continue". It was ask you to enter the amount of money you would like to add onto your card, credit card number and billing address. Click "OK" to review your payment.
Review the information and click the "Reload my CharlieCard" button on the bottom of the web page.