Because of making contacts. We have to make street and phone contacts. On the last day of the course , all the students have to go and make at least a 100 street contacts. That's a massive confidence booster . I personally am having problems right now. I got Bronchitis for 2 weeks and couldn't use my technique. After I got better , I didn't make any contacts. And that is really affecting me right now... But , it's still better than what my stutter was before .