Skimmed over the text, and or reading it quickly
Dear Teacher,
I am super sorry on how i have behaved in your classes. I am ashamed of what I have done. I am sorry that I was always late to class. Starting from when you read this letter, I will start following all the rules of your class just like all the other students. I would love if we can start our relationship over and get to know each other again, from the right foot.
Love
your soon to be fav Student
*edited* Well, I would start out with "If I were a color, I would be the color ____." Or "If I were a vegetable, I would be a(n) ____." Something like that.
ORIGINAL ANSWER: Why don't you just do it yourself?