We must also teach our dogs how to move their body, so they know how to move with us.
Do pivots in the front position and heel position. Remember not to use "cookie fingers." Instead, cup your hand and hold the treat between your first 2 fingers & secure it with your thumb (but don't hide it! Your dog should be able to nibble it, but not get it).
It is normal for a dog to crank their head when you first teach a pivot. At first, reward for little steps with the back feet. This will eliminate the head crank.