If I were to set this up again, I might simply create three domains-- one for staff, one for the middle and high school students with email turned on, and one for the younger students with email turned off, but with log-in access to Docs and Sites, to allow collaborative work to take place in a closed environment. You do not need to have email turned on to use these tools.We used the last two digits of YOG-last name-first initial for the student accounts. In addition, so their real name did not show up in the header of mail they sent, when setting up the accounts, I used the YOG-last name for the last name of the student and their first initial for their first name.