I have some high school help with my shop work. I generally tell them what I need done and supervise from afar until it gets to critical points, like torque specs, ect. I provide manuals and tools. It has varying success, but I feel its important to assist in learning. Challenging people in a positive way is good for everyone. It helps them feel involved and important. It makes them a stakeholder, and helps to show the importance of being a good operator in the field.