I think you'd be better off just providing teachers with the service ;)

buuut, if you want, for win32 at least, you can always

use PPM;
 PPM::InstallPackage("package" => $package, "location" => $location, "
+root" => $root);
 PPM::RemovePackage("package" => $package, "force" => $force);
[download]

instead of CPAN (I don't know about mac).

Or, just offer ready-to-run-on-platform.tar.gz-if-you-have perl-installed, which would have all the modules and their dependencies for that particular package in the tarball, and would require no compiling (this'll work for mac or win, since unix is not a problem)
 

Look ma', I'm on CPAN.

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** The Third rule of perl club is a statement of fact: pod is sexy.