Writing prompt: My Teacher

Student essay:
In my middle school life, there are many teachers and classmates. I can't forget them. But a math teacher impressed me most.
The math teacher was an old and gracious woman, but she was also mad because of the wrong things we did. One day, a student played his phone in class, Mrs. Jia was angry with him at first, but then she calmed down and began to tell us a story. When the story was over, everyone was moved. We knew the importance of time and how to make our lives meaningful. Although this class we didn't have any math knowledge, we learned something special. I thought everyone would remember it and thank for her.
In my opinion, students should respect their teachers. Our teachers give us knowledge and teach us how to be a useful person. We should understand them and never forget them. They will always be our teachers in our lives.

Corrected essay:
In my middle school life, there are many teachers and classmates. I can't forget them. But a math teacher impressed me most.
The math teacher was an old and gracious woman, but she was also mad because of the wrong things we did. One day, a student played his phone in class. Mrs. Jia was angry with him at first, but then she calmed down and began to tell us a story. When the story was over, everyone was moved. We knew the importance of time and how to make our lives meaningful. Although in this class we didn't learn any math knowledge, we learned something special. I thought everyone would remember it and thank her.
In my opinion, students should respect their teachers. Our teachers give us knowledge and teach us how to be useful people. We should understand them and never forget them. They will always be our teachers in our lives.

Error analysis:
error_sentence: One day, a student played his phone in class, Mrs. Jia was angry with him at first, but then she calmed down and began to tell us a story.
correct_sentence: One day, a student played his phone in class.
error: ,
correction: .
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: 〈One day, a student played his phone in class〉 and 〈Mrs. Jia was angry with him at first, but then she calmed down and began to tell us a story〉 contain independent subject-verb structures and can be independent sentences, therefore 〈,〉 is changed to 『.』.
error_sentence: Although this class we didn't have any math knowledge, we learned something special.
correct_sentence: Although in this class we didn't learn any math knowledge, we learned something special.
correction: in
error_type: Preposition Error
error_severity: 2
error_description: Preposition Error: When expressing time or place, 〈this class〉 needs to be paired with the preposition 『in』 to form a complete expression, meaning “in this class”, therefore 『in』 is added before 〈this〉 to ensure grammatical correctness.
error_sentence: Although this class we didn't have any math knowledge, we learned something special.
correct_sentence: Although in this class we didn't learn any math knowledge, we learned something special.
error: have
correction: learn
error_type: Verb Choice Error
error_severity: 3
error_description: Verb Choice Error: The verb 〈have〉 is inappropriately paired with the object 〈math knowledge〉; the correct verb should be 『learn』, indicating the action of acquiring knowledge, therefore 〈have〉 is changed to 『learn』 to conform to semantic logic.
error_sentence: I thought everyone would remember it and thank for her.

correct_sentence: I thought everyone would remember it and thank her.

error: for
error_type: Word Redundancy Error
error_severity: 3
error_description: Word Redundancy Error: The transitive verb 〈thank〉 can be directly followed by the object 〈her〉 to completely express the object of gratitude, therefore 〈for〉 is deleted to conform to grammatical rules.
error_sentence: Our teachers give us knowledge and teach us how to be a useful person.
correct_sentence: Our teachers give us knowledge and teach us how to be useful people.
error: a useful person
correction: useful people
error_type: Noun Number Error
error_severity: 3
error_description: Noun Number Error: The preceding 〈us〉 refers to a plural group of students, and the subsequent predicative noun should be consistent with the plural subject, therefore 〈a useful person〉 is changed to 『useful people』 to conform to grammatical rules.