Got this in my mailbox this morning from one of my current 9th grade students:

Dear Mr. Chang

Your math skills are vastly superior and I am glad to be placed in your class. I am lucky to have a well-trained math teacher because you teach with great etiquette, attitude, and with clear explanation.

First of all, I thank you for all of your assistance when I most needed it. When I came to your class, I felt a different teaching environment and my first impression was this math teacher has great etiquettes for teaching.

In addition, during your lectures, I have noticed a sense of good attitude in your lessons. I think that your teaching methods are ery commendable since I am getting a very good grade in your class.

Furthermore, the most important thing about why I thank you is your clear explanation of details in the lessons you teach. It is important for a teacher to have clear explanations, os students would understand and pick up what you are trying to teach us.

I appreciate what you have done and given to have success in your class, Mr. Chang. Thank you for being a good teacher, who helps and explains things clearly for me to understand.

Cordially,
Martin