This is taken from the coaches manual:
Stand with feet in an inverted 'V' position
Keep knees slightly bent and maintain posture
Push feet apart to approx. shoulder width by applying force to the inside edges of both feet
Pull feet together by bringing heels towards each other
Repeat the movement usig a rythm of 'bend-rise-bend-rise'. Bend the knees when feet go out, rise in the knees when the feet come back together.
Basically you need deep knee bends and a strong push outwards, when you get half way straighten the knees slightly and pull your heels together, then bend again ready for the next one. But remember...ALWAYS keep your back straight.
One thing i like to teach is a fairly big lemon followed by a two foot glide