Here is a video which breaks the move down into a few short steps, This one is a little tricky when you first start, don't worry too much if it's not perfect. Start off by kicking slowly, correctly and at a lower height, when you're happy with this you can go higher/faster/harder. Key points are turning in, getting your knee up, making sure your foot is turned to the side, and that you bring it straight back (the snap) before putting it down. In Shotokan you need to be able to do it from kiba-dachi for white/red/orange/yellow belts and from zenkutsu-dachi only for green belt and above. Hope that helps![/url]
