Xx, your best composition for grade three is 300 words.

I am a boy of 13 years old. I have many shortcomings and advantages. Let's not talk about my shortcomings here I'd better say I'm the best!

I am a good roller skater. What? You said you didn't believe it? You can ask my classmate Xu Yifan if you don't believe me. He can testify, because he also skates in the square. Of course, he doesn't skate as well as me. As the saying goes, "it is easy to see flowers, but difficult to embroider." Although I skate so smartly now, the first summer vacation was not like this. When you are a beginner, as long as you put on roller skates, your body will shake involuntarily. I fell off a big fart pier before I could stand firm. But I am not discouraged. I carefully observe how others slip. I gradually understood the basic essentials of roller skating, that is, "lean forward, lower the center of gravity, keep the pace even and keep steady." After some efforts, I finally got who I am today. Now I can slide backward freely, slide forward quickly, and stride (for turning) is very difficult. If you are not careful, you will fall down. There are many figure skating, too. First, they skate very fast, and then they turn in the same place for more than a dozen times. You can also stand on one foot and hang in the air to perform "Golden Rooster Independence"; You can also jump down four steps (very, very dangerous, not beyond the reach of a master).

I am also good at sports at school. Let's talk about high jump. Once in physical education class, the teacher taught us to jump high. The teacher told us the essentials: run fast, jump high and straighten your legs. After the teacher made several demonstrations, we began to dance one by one. Because I listened carefully, my legs stretched straight and I danced smoothly. After the dance, the teacher asked me to argue, "You dance well, you can show the students." So I jumped smoothly again. My excitement at that time is indescribable, because I just became a little teacher!

I still have many great things, so I won't say them one by one. Look at the things above, and you will know why I am great. That is, if you want to learn something, you must master the essentials, study hard and practice hard in order to succeed. I will use this in my study, make my study better, become a man with both civil and military skills and become a pillar of the motherland.