Instructions for Installing Mathematica on a home computer.

The license number is on the CD's.

For complete instructions goto the link below.
http://reference.wolfram.com/mathematica/tutorial/InstallingMathematicaOnWindows.html

Enter your name and license number and orginization is "Aberdeen High School" and then a MathID number will automatically generate for you (and it will be unique for each installation).  Then just click on the "Web" button and get your password which will be emailed to you and Mr. Evans will get a CC of the email.