Atleast you're not forced to saying your name loud. That was and still one of the hardest thing to me...Introduction day was like a judgement day for me while watching everyone having fun and making friends... I dont have trouble saying "here, yes, yea, right here (while raising my hand)"...just raise your hand while saying it...it will make it easier by removing the tension hopefully. Stay strong bro never give up. Write an email to your teacher explaining to him/her that you stutter and he/she will understand...