On the main page of the Teacher Center you will see a paragraph providing the username and where in the Teacher Edition that the password can be found.Example:
Some of the material on this site is password protected. To access these items, enter the following information at the prompt:
User I.D.: NAA110
Password: Go to page T5 in the Teacher's Wraparound Edition. Find the first blue word on that page.
Note: Both of these items are case sensitive. Be sure to enter them exactly as they appear here and in the text.