I say you should emphasise CPAN. The strength of CPAN is that a lot of smart people have done a lot of smart thinking already.

When you get presented with a problem, the solution often seems simple or obvious -- who needs a whole module to parse text into sentences? Find the full stops, you're done!

But the more you think about it, the more edge cases and provisos and local variations you come across. A CPAN module is, or should be, the result of someone having thought of all the problems already, and leaving you some configurability for the ones they haven't.