Hi sir! I made this letter to tell you how thankful I am that you are my teacher. I would like to express my gratitude for being your student. Thank you for inspiring and guiding me. Thank you for teaching us how to be responsible student and also for teaching us in your favorite subject MATH,  even though Math is really hard, I really tried to do my best to learn and I'm so thankful because you didn't give up on us. Your encouragement  and dedications taught me who I am. I wouldn't be where I am today without you. I really appreciate  your hard work. I want to say sorry because sometimes,  I/we don't listen or don't have any interests at all in your lesson. But, you continue to strive harder. Thank you for the love and patience. You are the best teacher.