Joke Collection Website - Cold jokes - Watch the moon from 7 to 9 every night. Why is this summer homework funny?

Watch the moon from 7 to 9 every night. Why is this summer homework funny?

For reference only:

According to Xinmin Evening News, "From now on, please observe the moon 1 time every night from 7: 00 to 9: 00, and draw the shape of the moon seen in 28 days." This is an assignment for "Summer Life" of Grade One in Shanghai Primary School. This topic stumped Tang Haiming, Secretary-General of Shanghai Astronomical Society and Senior Director of Science Communication Studio of Shanghai Observatory of Chinese Academy of Sciences. It turns out that according to astronomical laws, the rising time of the moon every day will be delayed by about 50 minutes compared with the previous day, that is to say, the moon will not rise until the early morning of the next day or even the early morning, and then quietly set during the day. According to the requirements of the topic, the child can't find the moon from 7 pm to 9 pm.

The moon will also rise during the day.

"Cultivating children's scientific spirit requires questioners to be rigorous and meticulous in every detail." Tang Haiming appealed.

Open "Summer Life", and there is a supplementary note in the title, "If it is rainy or cloudy that day and you can't see the moon, you can take the sky out first. After 28 days, please guess, if you can see the moon in those days that you don't draw, what shape might the moon be? Make up the shape of the moon you guessed and make a mark below. "

Tang Haiming reminded that such a statement is misleading. If children think that they can't see the moon just because of rainy or cloudy weather, they are wrong. In fact,

There is a period of time every month, from 7 pm to 9 pm, the moon can't be seen anywhere on the earth.

Because the rising time of the moon is delayed by about 50 minutes every day, take Shanghai in July this year as an example. From July of 12, the rising time of the moon will be after 2 1, in which the rising time of the moon in July of 12 is 2 1: 04 and the setting time of the moon is 7: 32 the next day. On July 13, the sunrise time is 2 1: 42, and the sunset time is 8: 28 the next day. On July 14, the sunrise time is 22: 19, and the sunset time is 9: 26 the next day ... and so on, until July 23, when the sunrise time and sunset time are 4: 36 a.m. and 18: 43 a.m. respectively, people can catch a glimpse of the upcoming "Sun" with high atmospheric visibility.

There are no loopholes in scientific homework.

"If children really want to complete the moon phase diagram according to their own observations, I am afraid they can only stay up late." Shang Haiming said with a smile. He admits that it is not difficult to "guess" the moon phase diagram with the help of search engines or nature textbooks.

But what is important in scientific inquiry is not the result but the process, so as to guide children to master the method of seeking truth from facts and finding out the truth.

There are inevitably loopholes in scientific knowledge in scientific homework itself. He suggested that this assignment might as well add a small question to make it more interesting. "When you can't see the moon in the sky from 7 pm to 9 pm, think about what is the reason?" In this way, children can also look up at the stars every once in a while and make records and observations instead of imagining them out of thin air.

Tang Haiming said that this common-sense loophole may appear in literary works or even texts if you are not careful.

In daily popular science activities, children are often most concerned about where the "brightest Polaris in the sky" is. This makes popular science workers laugh and cry-looking up at the starry sky, the brightness of Polaris is only second-class, far less than Vega and Altair, and it is easy to see with the naked eye in the night sky of Shanghai. When Tang Haiming was helping his son review his lessons, he found a text "Children Count the Stars" in Book 2 of Grade One of Shanghai Education Publishing House, which described the childhood story of Zhang Heng, a great astronomer in ancient China. The article says, "Not far from them (the Big Dipper), there is the brightest star called Polaris."

"In literary works, it is understandable to emphasize or exaggerate moderately in order to reflect the theme, but editors may wish to indicate scientific truth in their notes to avoid misunderstanding." Tang Haiming said.

Expose the disadvantages of rigid basic education

This "moon-watching problem" looks simple and interesting, and can also be endowed with great significance, such as cultivating children's ability to observe things and insisting on doing things seriously. But this kind of homework still doesn't jump out of the mechanical mode-doing one thing repeatedly every day. During the short primary school holiday, similar homework seems too "simple and rude" no matter what the main appeal is. Because holidays are the time for children to let their hearts fly, it is understandable to assign some homework, and if some repetitive actions are filled by holidays, it will not only become boring, but also form a heavy academic burden.

Not long ago, a parent quarreled with his daughter's teacher in the WeChat parent group for a summer homework, and was scolded by other teachers and asked to quit the group. The Chinese homework involved is as follows: each child copies a third-grade Chinese text every day and reads each text five times; Copy a composition in synchronous composition every day; Carefully read at least 8 books in the compulsory reading list for grade three. Observing this Chinese homework, "everyday", "copying" and "times" have become the key words. In view of the fact that the summer vacation days are much longer than a primary school Chinese textbook, it is inevitable to copy the same text repeatedly.

We can find that "the problem of watching the moon" is exactly the same as "copying it once a day". When "copying once a day" has become the mainstream of primary school homework, this boring and inflexible education method is really unacceptable, and the contradiction between home and school is inevitable. Of course, there seems to be a sense of innovation in "Watching the Moon", trying to replace boring text copying with observation and painting. However, this "innovative" effort severely hit the questioner's face because he made a common-sense mistake.

Basic education has changed from a single mechanical model to a flexible and diverse open model, which is loved by parents and children. Even if the transformation cannot be completed for a while, educators are required to uphold fresh and interesting educational concepts and make classroom teaching and extracurricular homework conform to children's lively and curious nature, instead of cramming and copying homework once a day in class.

To say the least, adult educators must be able to do what children are asked to do, which is the minimum educational prudence. If the teacher who gave the question could do the "moon-watching question" first, I'm afraid he wouldn't make such nonsense jokes.