hi if you struggle saying your name so much, just change it to something else that is easier for you to say. I did that when I had all kinds of trouble with the "B" sound of my first name. So I changed to a nickname I had in the Navy. maybe try this, before your teacher calls on you to say present; try taking a breath in and on the exhale try saying "Present". this will loosen up your throat muscles and make it easier. or just practice it a lot? Can you talk to your teacher and say something else, besides present like "here?" or something else? I hear ya, I have been there many of times where I wanted to communicate but i didn't dare because I couldn't trust my mouth for it to come out properly. I wish you the best of luck =)