Flutter kick, breaststroke kick

I asked something about the flutter kick rhythm in another thread, but I think the thread died before anyone read my post. I was wondering if someone could help me understand how to establish a rhythm, such as a 6-beat kick. The 2-beat makes sense, as I kick with the right leg while catching with my right arm, and vice versa. But on 6-beats I become totally lost, and cannot get that rotation umph from the kick. Is there a trick to getting the timing right? Is there a single right way? My question on the breaststroke kick is how do you teach someone to drop their legs prior to the kick. If the hips and legs stay high, then the kick partially goes out of the water (which is what happens with my son). Thanks.