Bickazer, tactile/kinesthetic magic is a wonderful idea, though, of course, as with most things, it has been used before. Avatar the Last Airbender immediately comes to mind (complete with Dragon Dance and an army of firebenders), though in that case, schools of magic were broken up by element, and i believe bending ability was inherited, not learned.
In any case, it's a beautiful idea, and I'd love to see what you'd come up with using it. There are several other things that need to be known to make it a full blown magic system - namely, why magic works that way. Are they directing some kind of latent magical energy through their bodies? Is it invoking spirits through dance? Where does the actual magical power come from, and what is it about physical movement that harnesses it? Are the schools of magic different in power source, or are they simply different styles of the same thing that work off the same principles? What does a resurrection dance look like? How about a killing dance? And of course, all magic needs limits. If you can overcome any obstacle with magic, then it doesn't make for a very interesting story.
Here's a great resource for any one interested in building magic systems: http://www.sfwa.org/writing/worldbuilding4.htm
Limits are the first thing on there. Some great questions to get you thinking, and to help you figure out exactly what you need to know.
~Annie
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