A graduation message to the teacher that reflects the characteristics of the subject, such as what can be used best in mathematics?

Teacher: Addition, subtraction, multiplication and division can't count your contribution. Poetry and songs can't praise my respect for you. Teacher, you are like a rainbow, which doesn't appear after the storm, in the sky, but only in my heart. I can't forget your encouraging words, your caring expressions and your severe criticism. Teacher, I love you!

classmate: six years of classmates have condensed our profound friendship. We play together, do our homework together, and help others together ... and yet, while China holds our friendship and and heaven remains our neighbourhood. Remember our wonderful memories of six years together, and I will never forget you!