Sorry for the late reply guys. These are the instructions.
"You need to register the Ethernet Address (EA) of your Network Card by filling in this form.
An Ethernet address is a string of 12 letters or digits (denoted as xxxxxxxxxxxx below) shown on your Network Card. The exact details of which depend on the vendor of the card. Examples are:
* EA=xxxxxxxxxxxx
* xx:xx:xx:xx:xx:xx
* xx.xx.xx.xx.xx.xx
The only thing that matches this is the MAC address ChrisFromCanada pointed out. Now after I've clicked "Network" on the side-bar of the About My Computer menu, I've realized that there are several different MAC addys if I select "Airport" or "Built-in Ethernet". If my school is asking to register my "Ethernet Address" that would mean I would use the MAC addy shown when I highlight "Built-in Ethernet", correct? If I were to register my wireless network card that would be the MAC address under "Airport" right? I'm guessing that the MAC address is supposed to be my network card ID.
Sorry for the stupid questions but I really need to make sure. Thanks for all the help. 🙂