Instructor of Practical Vocational Training: Handbook for Craftsmen, Entrepreneurs, and Farmers. Welcome to the handbook devoted to the key role of the practical vocational training instructor in the vocational training process. A practical vocational training instructor not only plays an important role in ensuring high-quality training, but also constitutes a key business competence of the workplace. Its activities not only support the development of employees, but also constitute an important source of income for an MSME.