today, I scribbled on the wall. I really regret why I couldn't control myself at that time. I knew that I had made a mistake. Graffiti on the wall is a very uncivilized behavior, which is wrong. I'm really sorry for letting the teacher get so angry. I am here for a profound review. I'm sorry, I realized my mistake. I will make up my mind to make up for it with my practical actions. Here, I promise that this will never happen again. I will strictly abide by the code of conduct and invite teachers to supervise.

Dear teacher:

Today, I was a little nervous in class because I was absent-minded. In order to relieve my nervousness, I scribbled on the music book, and was finally found by the teacher to criticize and educate.

Through this incident, I understand and realize that scribbling on music books is a very bad habit, which not only affects my study, but also destroys the beauty of music books.

for this reason, I promise that I will listen carefully in class in the future, and I will not do anything outside class or do anything that will affect the class process. I hope teachers and classmates will supervise my behavior.

guarantor: XX

X year x month x day.