One possible version:

                                                             A Helpful Friend

      I am a middle school student. I used to be weak in math and often failed math exams. I felt worried

about it. When my best friend Ann knew that, she promised to help me. And then she often went to my

home and helped me with my lessions. She taught me carefully and explained each problem over and

over until I understood. I started to he interested in learning math and now I have made great progress.

I am very thankful to my friend Ann.