Do chin ups make you get taller because your gym teacher says it will help stretch your hole body and it will help you get taller is it true don't answer until your 100 percent sure?

Only if your spine is compressed. The chin-up will not increase the length of your bones, just relieve compression on the intervertebral discs. I've been doing chin-ups/pull-ups with added weights of between 20 and 100 pounds as part of my workouts during the past thirty years and have not grown any taller. The chin-up is a great exercise for strengthening and toning the back and arm muscles.