For anyone who's interested, and doesn't live in Bristol, UK, I have posted a sample of a lesson plan for prospective students on my website. If you have a look, and then private message if you want to get the whole lesson, I can send it.
This is a lesson on the bass playing of Aston Barrett (Bob Marley) which takes you from some very basic grooves to some progressively harder ones. It's a good introduction to playing some rhythms which might be new to some players.
http://sites.google.com/site/bristolbassandguitar/Home