This page should describe the steps needed to turn a debian etch installation into a debian-edu etch installation.
Add the following two lines to /etc/apt/sources.list
deb http://ftp.skolelinux.no/skolelinux etch local deb-src http://ftp.skolelinux.no/skolelinux etch local
(You can also use etch-test instead of etch. etch-test is what is "unstable" in Debian, quoting http://www.debian.org/releases/ "The “unstable” distribution is where active development of Debian occurs. Generally, this distribution is run by developers and those who like to live on the edge." - Use at your own risk! See the [DebianEdu/ArchivePolicy archive policy] for more information.
As root, run
apt-get update apt-get upgrade # missing: document here how to add the debian-edu repo key to apt-key... # apt-get install debian-edu debian-edu-config debian-edu-install
Execute some magic foo
FIXME