Writing prompt: My Favorite Teacher

Student essay:
Dear Henry,
I am glad to hear that you get on very well with your maths teacher, Mr Green.Now I'd like to tell you about my favourite teacher.
I don't like maths at all until I met Mr Green.In my opinion,maths is a very very difficult subject.I could't work out the problems and I didn't understand the ways to solve them! I always got bad marks in the texts.In fact,I was very hard-working,but I always failed.
But when I met Mr Green,everything was changed.I did badly in the first text.I was so sad that I even wanted to give up maths.But Mr Green walked to me and told me that he thought that I was a clever girl and believed I could do better. That moved me a lot.With the help of him.My maths improved quickly.
Mr Green is really kind and patient.I love him very much!

Corrected essay:
Dear Henry,
I am glad to hear that you get on very well with your maths teacher, Mr. Green. Now I'd like to tell you about my favourite teacher.
I didn't like maths at all until I met Mr. Green. In my opinion, maths is a very, very difficult subject. I couldn't work out the problems and I didn't understand the ways to solve them! I always got bad marks in the tests. In fact, I was very hard-working, but I always failed.
But when I met Mr. Green, everything was changed. I did badly on the first test. I was so sad that I even wanted to give up maths. But Mr. Green walked to me and told me that he thought that I was a clever girl and believed I could do better. That moved me a lot. With the help of him, my maths improved quickly.
Mr. Green is really kind and patient. I love him very much!