Edging movements should be smooth, progressive, and fluid. Rotary movements should be de-emphasized, reduced, and controlled. Balancing movements should use the body's inertia rather than the snow and board as a base of support. Finesse is far more important than strength. If you could be a tree in the wind, be the willow, not the oak.
Sharp edges make for crisp turns.
Above all, keep lessons on ice fun and creative, and be sure not to jam too much information into students' stress-laden craniums. Erik Beckman is supervisor for the Sugarloaf Snowboarding School. A Certified Level III snowboard instructor and Level II alpine instructor, he has written a comprehensive text on snowboarding.