Obstacle of my life

The major obstacle of my life is that of going in to a good high school when i was back in China. There was test that was to be taken by all the grade 9 students, and every school that you wanted to apply for had an average mark that one was supposed to get on the test. During grade 7 and grade 8 I was not a person who liked to study, I was only 150 in a group of 300 people in grade 9. And in order to get into the school i wanted, I needed to squeeze into the high 70's. In order to achieve this, I used my free time to go to classes, and worked much more harder than i ever had. With this effort, i was able to achieve my goal in the end. After this, I knew that i could do whatever i set my mind into, and i had a confidence that i have kept with and have helped me achieve a lot.