How to write a letter to a teacher in English

Dear He Laoshi,

Hello! Although I see you every day, I still want to write a letter to express my gratitude.

Hello! Although I can see you every day, I still want to write you a letter to express my gratitude.

Teacher, you are like an unknown burning candle, illuminating all the students.

Teacher, you are like an unknown burning candle, illuminating all the students.

In my impression, you are a very caring and responsible teacher.

In my mind, you are a caring and responsible teacher.

I will remember my teacher's kindness to me.

I will remember the kindness of my teacher.

You are full of hope and expectation for us. We will live up to your high hopes and soar in the ideal sky!

You are full of hope and expectation for us, and we will live up to your high expectations and soar in the ideal sky!

Salute to you!

Salute to you!