This is a really simple summary of the different theories of learning styles. If you are a trainer, it is definately worth a read - it should help you to plan a session where everyone learns in their own way.
Personally, I am a big fan of mixing media - a bit of video, a quick survey, an open question and a group exercise in each topic. Think - discuss it, see it, do it.
I am an Auditary learner which explains why I love podcasts and talking books and never took many notes at college!
Here is the link - A simple guide to learning styles theory