Contractors can be hard to please. Educators at vocational and technical schools know this like the back of their hands.
Instructors at vocational schools know that many contractors seek out graduates from their programs, but they also know that some contractors may not. Some, they realize, would rather wait until a vocational school graduate has a few years of experience under his or her belt. Other contractors prefer to teach their own new employees the ropes, as they do not have faith in the vocational education system.