A vocal coach may need coaching, which can be in the form of instruction or consultation.
Doctors use a book called a PDR, Physicians Desk Reference, or consult with other physicians. It’s okay to not know something and to then learn it.
Knowing where to look is essential.
When guidance is needed or wanted, I can advise you or point you to the sources you need.
If your student has issues such as stage fright or is lacking in self-discipline and commitment, we can formulate a plan to help overcome the obstacles.