In BSK people of different ages and nationalities learn. The final goal of BSK is the active use of language in the workplace. The BSK lasts 6 months. The main purpose of the course is to enable the participants to communicate orally and in writing in the professional environment. The participants of the BSK want to learn the professional language for practical reasons, specifically to improve their own professional prospects. This book presents the practical experience and illuminates the tasks of teachers in BSK courses.