How to write a letter of apology if the teacher handed over your mobile phone?

Dear head teacher:

Here, I am very sorry to submit this review to you, because a review means that I have made a major mistake. This time, because I was playing with my mobile phone in class and not paying attention to the class, it had a serious impact on the order of the class. You observed my bad behavior, promptly stopped it, and confiscated my phone as punishment.

Now, after thinking about my faults and reflecting deeply, I am deeply aware of the seriousness of the mistakes I made:

First, as a student, Learning is undoubtedly one's own job and an obligation that must be fulfilled.

Secondly, education during college is very precious to everyone, but I was not enterprising, and even went as far as playing with my mobile phone during class and not paying attention to the lectures. This is a very serious mistake and a waste of educational resources.

Thirdly, as a student, I made such a mistake, which undoubtedly greatly failed my parents' ardent expectations of me. This was a big blow to my elderly parents.

My parents worked hard to make money and sent us to college so that we could study hard, find a good job, and live a better life in the future.

In order to provide us with good conditions for activities in all aspects, our parents bought us mobile phones. But I just didn't study hard and couldn't devote myself to studying. Instead, I played with my mobile phone in class. Now that I have done something wrong and failed my parents, I feel very ashamed. Thinking of my parents' hard work, I can't help crying.

Looking at my mistakes, I am also very sorry for the teachers who worked hard to educate me. The teacher works hard for us and prepares lessons for us, but I fail to live up to the teacher's hard work. If I don't listen well in class, it is disrespectful to the teacher. After this review, I will also formally apologize to the teacher in person.

Finally, I would like to write down my promise for the future: I promise not to do any disciplinary violations during class. My cell phone must be turned off or set to vibrate during class. From now on, I will listen carefully to every lesson, be a good student at school, be a filial son at home, and make my own contribution to society in the future.