There are homework exercises that MUST be done. There are 2 times 10 ‘ homework. If a student doesn’t do them as agreed – he may fail in accomplishing the goal. True, having the Forehand or Bachand technique level of “9” is also not bad, right?
So, if “he” follows all the instructions during 3 or 6-day-course, I guarantee with double, or triple, money back guarantee. Student who doesn’t jump in the promised quality level receives the 3 X money back. What s/he has to show are video recordings of done homework.