I was not good in math in the first year of junior high schoo1.Having been failed so many times in math exams，I was anxious about the subject．Every time I tried hardly to work out a math problem，I was afraid of making mistakes，that really made me feel helpless．Luckily，I met a nice math teacher in second year. She told me that I didn’t need to worry about making mistakes because I could find out my shortcomings through my mistake．She always encouraged myself to try again whenever I make a mistake．Thanks to my teacher’s encouragement，I became interesting in math and made rapid progress．My experience proves that failure was the mother of success and that we can learn a lot from our mistakes．