Martial arts instructors might be lucky enough to find themselves teaching seminars and workshops away from their schools. Keeping a martial arts school afloat comes with challenges. Both overhead and student turnover are high. Traveling to teach seminars provides an opportunity to make extra income, and so does selling DVDs featuring instructional material. A talented instructor could win over some new students while instructing away from home. The students may opt to pick up a DVD for sale at the seminar.