The school life is our best time because at that time we were so innocent , carefree and we didn't have to worry about the life. I had a wonderful time at high school where i had an unforgetful memory . I used to be a talkative person and this troubled me.i remember that it was the math lesson because I was quite good at maths and the teacher trusted and liked me. That made me selfish and I considered that I could do every troubles without concentrating . As usual , I and my close friend were chatting together . When she told me a joke I seemed to forget that I was in the class and I laughed loudly . Oh my god , everyone stared at me and i feel embarrassed . my teacher asked me to stand up and tell what did he said . obviosly ,i couldn't answer .Then he asked me to do the trouble on the blackboard , I watched it confidently and i said :"excuse me, may be, you are wrong";.At that time the teacher's face seemed to change color . "am i wrong ?, you're kidding" said he .to tell you the truth , i scared a lot and coudn't say a word . my teacher looked at me and looked at the trouble again .suddendly, he said:"ah, I missed a number".until that time, I feel safe. Thankfully , he fogave my fault in case I would never do it again . Frankly , I also didn't have enough courage to do it again . It could cause me heart attack.I'm a student right now . however, whenever I visit my old teacher . he usually repeat this story and that make me love my old class ,school more and of course consist of my respectful teacher...