In such a situation, one should first be clear about one's mistake and admit it. Then, he should express his sincere apology to the teacher and explain why he had made this decision. Next, you can write down your thoughts and try to explain why this is the right thing to do. Finally, you can write down your promise that you will correct your mistakes and take your homework seriously. The review should be honest, sincere, and express the recognition and commitment of one's mistakes.