No homework for 34 years! Three principals relay "efficient classroom"

  Is there a contradiction between not leaving homework and improving grades? The Fifth Primary School of Shenyang Railway has given an almost perfect answer with 34 years’ practice.

  When many parents are anxious to accompany their children to do homework after class, the three principals of this primary school insist on not leaving written homework for 34 years, and carry out the experiment of happy education reform, so that students can effectively integrate into learning under the guidance of interest and reduce the burden and improve the quality under the concept of happy education.

  Ask for quality in a 40-minute class

  "Only teachers who don’t understand, no children who can’t learn. There are so many knowledge points that there is no need to leave homework and practice repeatedly. " Zhang Xiujin, the old headmaster, said.

  Railway five primary schools do not leave written homework, which originated in 1984. At that time, the students had a heavy burden, so Zhang Xiujin, then the principal, decided to reduce the burden in the whole school and started a pilot class first. The method is simple: be effective in the classroom, increase the interaction between teachers and students, and mobilize the enthusiasm of students. After half a year, the results of the pilot class are significantly higher than those of other classes. Since then, no homework has been left in the whole school from grade one to grade six.

  "Efficient classroom" is a high-frequency word mentioned by teachers in the interview. "The sea tactics is a misunderstanding. Teachers should concentrate the most essential knowledge points in the classroom so that students can draw inferences from one another." Yu Ying, the current principal, said that teachers should ensure that all the knowledge learned by students in every class, every day and every stage can be absorbed and digested in the classroom. This is called the "three cleanups" system.

  In order to realize the "Three Clearances", in Railway No.5 Primary School, teachers spend a lot of energy on preparing lessons and teaching exchanges to ensure the high quality of teaching. After Yu Miao, a fifth-grade teacher, came to Railway No.5 Primary School, all school leaders attended the class collectively, giving her suggestions and guiding the improvement of classroom teaching. In 2017, she won the title of senior Chinese subject in the "Evaluation of Good Classroom Teaching in Heping District".

  In order to improve students’ ability to study efficiently, the school offers a 15-minute mini-training course every afternoon. From writing and memorizing in a limited time in junior grades to arranging and communicating mind maps in senior grades, students’ abilities of memorizing, listening and summarizing are greatly improved, and their thinking quality is greatly improved.

  In the past 34 years, the tradition of not leaving written homework has been preserved. For Yu Ying, the current principal, the pressure to insist on not leaving homework has only increased over the years: although the junior high school has been cancelled, the pressure to enter a higher school has moved forward, parents have higher expectations for their children, and the difficulty of various exams has also been continuously improved. Can the trick of not leaving homework still be used?

  "As long as the educational concept is correct and you have the determination to stick to it, ‘ Independent and efficient ’ If the classroom teaching is realized, there is no need for homework. " Yu Ying, who has been a teacher for 26 years since she joined the work, explored the educational idea that "students are the future", and made the school’s educational strategy and action plan with cultivating students’ core literacy and providing appropriate education for children as the core concept.

  Today, there are 67 classes and more than 3,100 students in three campuses of Railway Five Primary Schools, and all of them still insist on leaving no written homework.

  What do students do after school?

  There is no written homework after class. What do students do when they go home? And the school doesn’t care at all

  After school, Shi Diance, a fifth and second grader of the railway, did not go home directly, but once again devoted himself to his favorite ice hockey training ground. He has been practicing ice hockey for nearly a year, and he has performed brilliantly in the Liaoning Ice Hockey League. After two hours of training, he turned on the TV at home first, not to watch cartoons, but to watch the news on the hour. Before going to bed, he watched the extracurricular book Magic School Bus recommended by the head teacher for a while.

  In Railway No.5 Primary School, there is no unified written homework, but every child will arrange his life after school according to his own interests and specialties: reading novels, doing handicrafts, practicing calligraphy, and dancing street dance … …

  According to reports, in order to enrich students’ extracurricular activities, Railway Five Primary Schools recommend "books with words" and "books without words". "Books with characters" are traditional books. By recommending books regularly, offering one-hour reading class every week, reading exchange once a month and reading festival once a semester, students’ ability and quality of lifelong reading are cultivated. "Wordless book" is news, which guides students to read newspapers, listen to the radio and pay attention to online news every day, and carries out students’ independent "broadcast", "comment" and "debate" news every morning.

  The school has set up 20 compulsory courses such as intelligent robot, Orff music and digital art, and more than 60 elective clubs such as science and technology, art, fitness, reading club and English club to help children locate themselves and find their own interests. At the same time, further enrich students’ life at school and after class, and prevent them from drowning in the sea of books and mountains.

  Happy education makes students enjoy it endlessly.

  "Everyday Dad", a fourth-grade parent of the fifth grade of the railway, said in the opening message to all parents of freshmen in 2016: "The school is characterized by not leaving homework, reading and broadcasting news. With these characteristics, children’s knowledge and learning efficiency will become unusual."

  Li Jiaxi, a fourth-grade student, had an average academic record, and sometimes she showed hyperactivity, inattention and low learning efficiency in class. Since joining the school maker space club for one year, he has become a core member of the study group and a small star of science and technology. The innovative works he led the team members to study together — — "Portable One-stop Mobile Phone Companion" has been shortlisted for the 2018 Shenyang Youth Science and Technology Innovation Competition.

  Wang Hongliang, a graduate of the school in 2013, is now studying in Liaoning Experimental Middle School. In 2016, he was ranked third in the city with a score of 744 (out of 760) in the senior high school entrance examination. He benefited a lot from his study experience in Railway No.5 Primary School.

  "High school is very stressful and hard. Whenever I encounter difficulties, I always think of the experience of primary school. A large number of books read at that time are still fresh in my memory until now; Watching the news broadcast every morning makes me develop the habit of paying attention to current affairs and politics, which is of great help to the study of politics and other subjects. " Wang Hongliang said, "What impressed me the most was the robot community, which cultivated my hands-on, innovation, spatial thinking and other abilities. Sometimes I don’t need to draw pictures to solve solid geometry problems, so I can see the form built by Lego in primary schools … … The education of Tiewu contains too many things that are useful for growth. It was only when I was in junior high school and high school that I slowly revealed it and let me enjoy it endlessly. "

  Along the way, doubts and doubts were heard in not fade away. However, the five primary schools of the Railway did not change their minds, persisted in exploring new measures for running a happy education, and constantly introduced new curriculum systems such as micro-courses, science and technology courses, research and practice courses, and handed over beautiful transcripts: the quality monitoring of students’ subjects ranked among the best in the whole region, and the achievements in Chinese and English subjects ranked third and fourth among 55 primary schools in the experimental area of the city. In recent five years, they won hundreds of honors in science, technology, art and sports at or above the provincial level.

  President Yu Ying said: "As basic educators, we will continue to inherit and carry forward the ideological essence of pleasant education, actively explore new fields under the conditions of information technology reform, start with students’ learning ability and study habits, and focus on students’ infinite possibilities in the future to improve the quality of life in childhood." (Reporter Wang Ying)

Eight-year-old girls often eat chicken to cause precocious puberty? As long as you eat chicken like this, you don’t have to worry at all.

Original Ruan Guangfeng Ruan Guangfeng nutritionist

Image source freepik.com

Chicken is a kind of meat that we usually eat. Fried chicken, braised chicken, spicy chicken and boiled chicken are all delicious. Besides, chicken wings, chicken legs, chicken gizzards and chicken offal are all delicious.

Image source Weibo screenshot

Recently, however, Xiaoyu, who is not yet 8 years old in Hangzhou, felt breast swelling and pain. When she took a bath at night, she found that her breasts became bigger. Her family took Xiaoyu to the hospital for examination and was diagnosed with precocious puberty. The doctor said that he has also received many children with precocious puberty in these years, and the youngest is only 5 years old.

Image source Weibo screenshot

The doctor said that children like Xiaoyu should not eat foods containing hormones, especially chicken, in their daily diet, which will make their children prosperous and develop early.

Chicken is really a hormone, and eating it will lead to precocious puberty? Let’s talk about precocious puberty and diet today

01

What is precocious puberty?

Precocious puberty (PP) refers to that boys have secondary sexual characteristics before the age of 9, girls have secondary sexual characteristics before the age of 8, or girls have menstruation before the age of 10 [1].

According to the pathogenesis and clinical manifestations, precocious puberty can be divided into true precocious puberty and false precocious puberty [2].

True precocious puberty, that is, central precocious puberty (CPP), also known as gonadotropin-releasing hormone-dependent precocious puberty, means that the hypothalamus secretes and releases gonadotropin-releasing hormone (GnRH) in advance, which activates the pituitary gland to secrete gonadotropin, causes the development of internal and external genitalia and secondary sexual characteristics until the reproductive system matures.

Pseudo-precocious puberty, that is, peripheral precocious puberty, also known as non-gonadotropin-releasing hormone-dependent precocious puberty, refers to the increase of sex steroids to puberty level caused by gonadal tumors, adrenal cortical hyperplasia or other reasons.

Pseudo-precocious children show early secondary sexual characteristics, but they do not have reproductive ability.

Image source freepik.com

02

What causes can lead to precocious puberty?

The causes of precocious puberty are very complicated, which may be the result of the joint action of many factors. Including genetic factors, diseases, obesity and environmental factors [3]:

1. Genetic factors

Genetic factors are one of the important causes of precocious puberty. At present, it has been confirmed that the mutation of some genes will lead to precocious puberty. Gene polymorphism is also closely related to the onset of puberty, and some loci polymorphism will affect the transcription or expression of genes and the function of gene products. In addition, some hereditary diseases may lead to precocious puberty.

2. Illness

Aside from genetic factors, the main causes of precocious puberty are various diseases.

For example, the most common cause of central precocious puberty is organic diseases of the central nervous system, such as hypothalamic and pituitary tumors or other central nervous system diseases [4]. Some guidelines for diagnosis and treatment also clearly point out that central precocious puberty must be diagnosed, and special attention should be paid to excluding organic CPP caused by nervous system abnormalities and secondary diseases.

Image source [5]

The main causes of pseudoprecocious puberty are also some diseases. For example, hereditary ovarian dysfunction, benign ovarian occupying lesions such as autonomic ovarian cysts, estrogen-secreting adrenal cortical tumors or ovarian tumors, and ectopic human chorionic gonadotropin-secreting tumors may lead to precocious puberty in girls; Congenital adrenal hyperplasia), adrenal cortical tumor or testicular interstitial cell tumor, ectopic HCG secretion tumor, estrogen-producing adrenal cortical tumor or testicular tumor are easy to cause precocious puberty in boys.

Image source [6]

3. Exogenous hormones/environmental interference

Taking a large amount of estrogen, hormone-like substances and endocrine disruptors in the environment, such as phthalate esters, polychlorinated biphenyls and bisphenol A [7], as well as some pesticides and heavy metals, may also lead to precocious puberty in children.

Image source freepik.com

4. Obesity

More and more evidence shows that childhood obesity increases the risk of puberty precocious puberty, and the risk of girls is significantly higher than that of boys [8].

As you can see, the main cause of precocious puberty is actually some diseases-related reasons. Therefore, the guidelines for the diagnosis and treatment of precocious puberty suggest that if children really have precocious puberty, they should first check whether there are diseases and other effects.

03

Food can lead to precocious puberty?

In fact, ordinary food and diet are not directly related to precocious puberty.

But as I said before, obesity will increase the risk of precocious puberty [9]. Therefore, the food and diet that can easily lead to obesity have something to do with precocious puberty.

For example, children’s living conditions are much better now than before. They often eat fried food, often drink sweet drinks, and seldom exercise … These are all easy to lead to overweight and obesity, which will increase the risk of precocious puberty from the side.

To say that it has a certain impact, supplements and health care products count as one. Nowadays, many parents will give their children supplements and health care products, such as those that grow taller and promote growth. Hormones are often added to these supplements, which will lead to precocious puberty.

Image source freepik.com

04

Chicken is full of hormones, which leads to precocious puberty?

The argument that chicken leads to precocious puberty has been widely circulated. The main reason is that chickens now grow fast and come out in 40 days. They are all fast-growing chickens with hormones, which will lead to precocious puberty.

In fact, this statement is completely unwarranted.

The fast-growing chicken we are talking about now belongs to the "fast-growing white feather chicken" [10]. Its rapid growth is the result of improved variety breeding and scientific feeding, and has nothing to do with hormones [11].

This kind of chicken has a high feed conversion rate. It grows fast and is big, and now they eat better feed. These feeds are not just mixed with corn flour and diced Chinese cabbage. They are similar to the "nutritious meals" we often hear now. They are all made by scientific combination of raw materials selection, ingredient ratio, production technology and feeding scheme. Therefore, it can be released in about 40 days now, and the weight can reach 2-3 kg [12].

You can see that from 1957 to 2005, the breeding of chickens has changed [13]

We often see on the Internet and TV that the problem of exposing chickens is actually the abuse of "antibiotics" and has nothing to do with "hormones". If you really take hormones, the health of chickens will be bad, and hormones are quite expensive.

Generally speaking, there are no more hormones in chicken. Precocious puberty really has nothing to do with eating chicken. At present, there is no evidence and case that chicken or other meat may cause precocious puberty in the world, and there is no treatment guide for precocious puberty that says you can’t eat chicken. Moreover, chicken is white meat that is usually said in nutrition. In fact, it is quite good for health, so you don’t have to worry about eating it normally.

However, if you always fry chicken and add a lot of oil when eating chicken, it will lead to too much energy and increase the risk of obesity, so it is wrong to eat it.

Image source freepik.com

05

How to prevent precocity?

Diet is mainly to prevent obesity, while avoiding accidentally eating hormones. From the perspective of diet and life, it is suggested that:

1. Improve eating habits and prevent overweight and obesity.

More and more evidence shows that childhood obesity increases the risk of precocious puberty, and the risk of girls is significantly higher than that of boys. Parents are advised to help their children improve their eating habits from an early age, develop good eating habits, reduce the intake of high-calorie, fried, high-oil and high-sugar foods, such as eating less fried foods and drinking less sugary drinks, and increasing the variety of foods to help control weight.

Specific to chicken, try to eat less chicken cooked by fried chicken, braised chicken, spicy chicken and other cooking methods, which is oily and high in energy, and boiled and steamed chicken is better; When eating chicken, give priority to chicken breast, which has less fat and can better prevent obesity.

2. Increase physical exercise and physical activity.

This is actually to prevent obesity. By increasing energy consumption, let children do outdoor activities every day instead of always staying at home.

3. Don’t eat supplements and health foods indiscriminately.

There is no need to worry about the hormones in normal food itself. However, many so-called supplements and health products may have added exogenous hormones, which may easily increase the risk of precocious puberty. As long as children eat normally and pay attention to balanced nutrition, most health care products and supplements are unnecessary.

References:

[1] Tan Qian, Huang Lu, Yang Jieping. Research on the emotional situation and influence factors of children’s early sexual maturity [J]. Frontier of Medicine and Medicine, 2020,10(27):8-10.

[2] Ministry of Health of the People’s Republic of China. Guidelines for the diagnosis and treatment of precocious puberty (for Trial Implementation) [Wei Ban Yi Zheng Fa (195)No. ][J]. China Journal of Child Health, 2011, 19 (4): 390-392.

[3] Sun Yanyan, Yu Jian. Research progress on the etiology of precocious puberty [J]. journal of applied clinical pediatrics Journal, 2011,26(20):1599-1601.

[4] Liang Liyang, Li Fangping. Diagnosis and treatment of precocious puberty [J]. Drug Evaluation, 2016,13(03):27-31.

[5] Endocrine Genetics and Metabolism Group of Pediatrics Branch of Chinese Medical Association. Consensus on diagnosis and treatment of central precocious puberty [J]. Chinese Journal of Pediatrics, 2015, 53(6): 412-418.

[6] Chen Ruimin. Research progress on the etiology of peripheral precocious puberty [J]. journal of applied clinical pediatrics Journal, 2012,27(20):1545-1547.

[7] Jing Xu. Study on the correlation between precocious puberty in children and lifestyle and family factors [D]. Zhejiang: Hangzhou Normal University, 2017.

[8] Puberty Group of Women’s Health Branch of Chinese Preventive Medicine Association. Consensus on diagnosis and treatment of female precocious puberty [J]. chinese journal of woman and child health research, 2018,29(2):135-138.

You Xiaomeng, Shan Chuan, Shen Xiuhua. Research progress of childhood obesity and precocious puberty [J]. Journal of Shanghai Jiaotong University (Medical Edition), 2012,32(7):949-951.

[10] Boya. Fast-growing broilers will still be the leading variety of broiler production in China [J]. Agricultural Knowledge (Scientific Breeding), 2013,(9):16-16.

[11] AARON Li, Du Zhiqiang, Wang Shouzhi, et al. The past, present and future of white feather broiler breeding [J]. China Poultry, 2016,38(19):1-8.

[12] Gao Lin, Bai Zijin. On the technical system of healthy and ecological breeding of fast and large white feather broilers [J]. Journal of Shenyang Agricultural University (Social Science Edition), 2015,17(2):213-218.

[13] https://www.washingtonpost.com/news/wonk/wp/2015/03/12/our-insatiable-appetite-for-cheap-white-meat-is-making-chickens-unrecognizable/.

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