You should see a picture of a funny little man named Jim
Click where it says "Login to review and update information about yourself, change your existing password, ..."
Type in your user name and existing password
Click on the button that says "Change password or password hint"
After carefully reading every single word of the district AUP, click "Accept" at the bottom
Read all the rules about creating a password, type your existing password where it says "old password", and the password you want that meets all of the rules into the boxes labeled "new password" and "re-enter new password"
Click "submit"
Read the message it gives you to make sure it accepted the change.
If you have problems with this, you can have Mr. Gehringer change it for you in the band room or during lunch or Nutrition in K114. The secretaries in K114 know how to do this also, and if you give them your best "lost child" look, and they're not too busy, and you can convince them they you have a password that can be changed the same way a teacher changes their password, they might help you out.