It’s all about solutions. 

If you give a student an “empty” correction it isn’t useful. You have to somehow describe–in a way that they can understand–how not to repeat the mistake. Corrections come with solutions that can be applied will make someone a better dancer. Those that don’t will just erode a student’s self-esteem and make them feel frustrated.

Try to show the student the right way of doing the step, rather than just pointing out what they did wrong. Then break it down verbally for them if possible as well. The more feedback you can give them, the better the chance they will understand how to correct the problem!