You will need a running instance of Skolelinux, either on a physical
or virtual machine. For testing with a virtual machine, see
<URL:http://wiki.debian.org/DebianEdu/HowTo/TestCDinstall>. If you
select a standalone installation, you should get an instance that
would be easy to copy the package into it using scp or wget (from the
inside of the virtual machine, that is).
To build the package, you need a debian machine with all the build
dependencies installed. Any Debian/Etch machine will do, and use
'apt-get build-dep debian-edu-artwork' to install them. I also
suggest installing fakeroot, lintian and devscripts, to be able to
build the package as a normal user using 'debuild'.