Determine the center and write the profound meaning. We should try our best to dig out the philosophy of life contained in the written events or find out its bright spots, think repeatedly and determine the central idea of the article. Is that he is good at writing profound meanings from ordinary little things.

The six elements of the article should be made clear. The occurrence of a thing can not be separated from six aspects: time, place, people, cause, process and result of the thing, which is the so-called "six elements". Only by explaining these aspects clearly can readers have a clear and comprehensive understanding of the things described.

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Summarizing the homework learning process, my deepest feeling is:

On Saturday afternoon, my good friend Gu Xinyuan and I came to a big tree with good tools: tape measure, bamboo pole and notebook, and took action with great interest. Let's measure the actual length of the bamboo pole first. This process is very simple. But when the shadows are long, the weather is bad for us. Grandfather Sun appeared and disappeared, which brought great inconvenience to our business.

The key to measuring the shadow of bamboo poles and trees is to move quickly, because the length of the shadow will change after a long time. There is no choice but to wait until the sun is completely exposed. But when we went home to rest, the sun came out again, and when we hurried downstairs, the sun disappeared again. In this way, we tossed about for a long time and didn't finish our homework.

Finally, we decided to stay under the big tree and wait for the best opportunity. The sun finally came out, and we were very excited, and our dissatisfaction disappeared. We acted quickly and cooperated tacitly, and soon finished measuring the shadow of the bamboo pole. Now only the shadow of the big tree is left.

Who knows that just about to start work, the sun hid naughtily again, and our joy suddenly vanished. I complain that I am really helpless, because my previous efforts may fall short. Hey, start over!

After waiting patiently for about five minutes, the sun finally appeared. The two of us are ecstatic. We made a quick survey and made a brief record, and finally calculated the height of the big tree accurately. At this time, we are all relieved.