Home / All case / 汉语网络课堂测试平台分享 见PPT。 （原文链接 ：https://mp.weixin.qq.com/s/YkGcR0VDbMfkT1iuA8XVHw） Collection Share 微信扫一扫：分享 微信里点“发现”，扫一下 二维码便可将本文分享至朋友圈。 Download Package ID： 4d4b38a7-507f-3a18-7597-de9b256af429 Author： teacheradmin Upload Date： 2023-06-09 Classification： Classroom Management Region： Europe Viewed： 670 Downloaded： 1 Collection： 0 Label： 教学工具 Case Notice： 本案例为荷兰格罗宁根孔子学院教师总结的适用于网课测试的平台。在与网络课堂磨合的过程中，格罗宁根孔子学院的老师们发现了很多实用的课堂教学工具。由于疫情等因素，大部分老师都要在网上组织考试，为了确保考试顺利进行，格罗宁根孔子学院的教师尝试了多个网络平台，现将这些教学平台整理分享给需要的汉语教师。 Case Material： All Categories 汉语网络课堂测试平台分享.pp... 汉语网络课堂测试平台分享.do... 汉语网络课堂测试平台分享.pn... Select All Download Latest comments： All comments No comment Related to the case： 汉语网络课程教学工具分享-Fakebook Classroom Management 汉语网络课程教学工具分享-Baamboozle Classroom Management 汉语网络课程教学工具分享 Classroom Management Case review 汉语网络课堂测试平台分享 Release Message Board Requests Suggestions Complaints release Message has been sent successfully, we will reply as soon as possible within 48 hours! Help The title specification: 1. Accuracy: clearly describe the general outline of the article 2. Concise: the title should not be too long 3. Novelty: the title should be unique 4. Number of words: 4-40 Cases Release Specification: Content requirements： 1. Framework requirements A case should consist of five parts: background, theme, context, result, and analysis. Background: The case should explain the relevant circumstances of the story: time, location, characters, cause of the event, etc. Theme: The case must have a theme. It is recommended to start the case from the most rewarding and enlightening prospective, and then choose and establish the theme. Context: Go through all the original materials of the case and select the targeted content. Results: The case should explain the teaching ideas, describe the teaching process, and explain the teaching outcome, that is, the immediate effect of such teaching measures, including students' reflections and teachers' feelings. Comment and analysis: The author must have certain opinions and analysis on the topics and content reflected in the case, including the teaching methodology, process, results, and its pros and cons. 2. Content Requirements The Chinese national flag, national anthem, national emblem, map, etc., should be used correctly in all case materials. For map usage, please do refer to "Standard Map Service System"; Please avoid comparisons involving ideological issues and national values; Please avoid the following content: Content that shows ugly behaviors, vulgar languages, or horrifying scenes; content that destroys the ecological environment, hunts and kills indiscriminately, or abuses animals; content that insults, slanders, derogates, or spoofs others; content that is not supportive to the positive development of children, such as smoking, alcoholism, fighting, drug abuse, or gambling, etc.; content that violates personal privacy; content that infringes the intellectual property rights of others; other content prohibited by the laws and regulations of China and the country where the teaching is located; content that involves major natural disasters, accidents, terrorist incidents, wars and other disaster scenes; content of trademarks or advertisements involving commercial value; countries in the world and religious taboo content. Production requirements: Cases are divided into two types: text cases (text/pictures/charts, etc.) and multimedia cases (video/audio, etc.). 1. Text case There is no intellectual error or typo; all pictures used are clear and without copyright issues. 2. Multimedia case File format: the video resolution is not less than 1920×1080 pixels; the video bit rate is not less than 8Mbps; the audio sampling rate is 48kHz; the video format is mp4 or mov; a single file size is less than 2G. Image quality: The image should have good lighting conditions, low noise, reasonable white balance, aperture, exposure compensation and other parameters; the lens should be stable without jitter; the image should be filmed with horizontal screen with accurate focus; audio and video should be well synchronized; teachers should dress-up appropriately; no logo should be showed in the image; no obvious clipping error should be found. Sound quality: The background should be quiet without echo; the sound has no obvious distortion; the sound volume is stable with no obvious noise; the accompanying sound is clear, full, and mellow; there is no obvious proportion between the character dialogue and the live sound; there is no obvious dis-proportionality between the character dialogue and the background music. Cover specification: 1. The picture should be clear 2. The cover image must be consistent with the content 3. Comply with relevant laws and regulations 4. The cover image is completely displayed 5. The size of the cover image is not more than 5M The selection of high-quality cases must meet the following content standards: 1. Concise topic selection: The topic shall be conducive to teaching. The selected topic should be closely linked to the syllabus, focusing on a certain knowledge point, teaching activities, cultural activities, etc.. The topic selection should be brief and clear. 2. Typical topic selection: the topic should be positioned accurately with features. The case should be designed around common, typical, and representative problems or content in daily teaching or learning. The case should effectively explain key language points, and solve difficult problems as well as doubts in teaching and learning practice. 3. Correct on knowledge: the knowledge points and grammatical points in the case are rigorously described; the text, symbols, units and formulas are in line with national standards and publication specifications; the work is free of copyright infringement and is not oriented to sensitive content; the national flag, national anthem, and national emblem are correctly used according to relevant regulations. Regarding to any map usage, please refer to "Standard Map Service System http://bzdt.ch.mnr.gov.cn". 4. Goal achievement: The case should be convenient for teachers to apply in teaching practice, with good versatility and strong interaction. It can effectively solve practical learning and teaching problems, efficiently achieve the teaching subjective, and support the development of learners' knowledge and ability. Video cases must also meet the following technical standards: 1. File format: the video resolution is not less than 1920×1080 pixels; the video bit rate is not less than 8Mbps; the audio sampling rate is 48kHz; the video format is mp4 or mov; a single file size is less than 2G. 2. Image quality: The image should have good lighting conditions, low noise,reasonable white balance, aperture, exposure compensation and other parameters; the lens should be stable without jitter; the image should be filmed with horizontal screen with accurate focus; audio and video should be well synchronized; teachers should dress-up appropriately; no logo should be showed in the image; no obvious clipping error should be found. 3. Sound quality: The background should be quiet without echo; the sound has no obvious distortion; the sound volume is stable with no obvious noise; the accompanying sound is clear, full, and mellow; there is no obvious proportion between the character dialogue and the live sound; there is no obvious dis-proportionality between the character dialogue and the background music. Exquisite Case Evaluation Criteria The selection of high-quality cases must meet the following content standards: 1. Concise topic selection: The topic shall be conducive to teaching. The selected topic should be closely linked to the syllabus, focusing on a certain knowledge point, teaching activities, cultural activities, etc.. The topic selection should be brief and clear. 2. Typical topic selection: the topic should be positioned accurately with features. The case should be designed around common, typical, and representative problems or content in daily teaching or learning. The case should effectively explain key language points, and solve difficult problems as well as doubts in teaching and learning practice. 3. Correct on knowledge: the knowledge points and grammatical points in the case are rigorously described; the text, symbols, units and formulas are in line with national standards and publication specifications; the work is free of copyright infringement and is not oriented to sensitive content; the national flag, national anthem, and national emblem are correctly used according to relevant regulations. Regarding to any map usage, please refer to "Standard Map Service System http://bzdt.ch.mnr.gov.cn". 4. Goal achievement: The case should be convenient for teachers to apply in teaching practice, with good versatility and strong interaction. It can effectively solve practical learning and teaching problems, efficiently achieve the teaching subjective, and support the development of learners' knowledge and ability. Video cases must also meet the following technical standards: 1. File format: the video resolution is not less than 1920×1080 pixels; the video bit rate is not less than 8Mbps; the audio sampling rate is 48kHz; the video format is mp4 or mov; a single file size is less than 2G. 2. Image quality: The image should have good lighting conditions, low noise,reasonable white balance, aperture, exposure compensation and other parameters; the lens should be stable without jitter; the image should be filmed with horizontal screen with accurate focus; audio and video should be well synchronized; teachers should dress-up appropriately; no logo should be showed in the image; no obvious clipping error should be found. 3. Sound quality: The background should be quiet without echo; the sound has no obvious distortion; the sound volume is stable with no obvious noise; the accompanying sound is clear, full, and mellow; there is no obvious proportion between the character dialogue and the live sound; there is no obvious dis-proportionality between the character dialogue and the background music. Agree Disagree

Happy Chinese - Lesson Ten Wang Lingyu 21 Learned 2021-07-08 Shot on China Teacher：汪玲玉 （Asia · China） Target audience：Teenager Difficulty：Easy Direction：Chinese Learning Upload time：2021/07/08 Tags: Happy Chinese Subscribe This course is based on the second volume of Happy Chinese and selects excellent teachers with rich international Chinese-teaching experience to conduct lessons. The teaching materials, script design and character activities used in the shooting are all derived from the international Chinese-teaching practice. The classroom activities presented in the course are easy and natural, the topics are real and interesting, and the resources and information are abundant. It can not only be directly used as a supplement in classroom teaching but also meet TCSOL's needs for further education. 1 Boutique courses Change it A foreigner speaks Chinese | The first line of the couplet: Look at the wood in the door leisurely Can you write the second line of the couplet? - Chinese Bridge for College Students Dolphin Baby series lessons - Avanti fights thief A foreigner speaks Chinese | There are many bacteria on the bus. Don't eat on the bus - Chinese Bridge for College Students Happy Chinese - Lesson Nine Wang Lingyu Word series: Interpret "door" Dolphin Baby series lessons - Wonderful Soil A foreigner speaks Chinese. I want to raise the sail of my dream with positive energy and make my dream come true! #Baduanjin# Demonstration class [Teaching in Spanish] Comments Submit All comments You have no courses yet, please go to to find them.

Happy Chinese - Lesson Seven Wang Lingyu 43 Learned 2021-07-07 Shot on China Teacher：汪玲玉 （Asia · China） Target audience：Teenager Difficulty：Easy Direction：Chinese Learning Upload time：2021/07/07 Tags: Happy Chinese Subscribe This course is based on the first volume of Happy Chinese and selects excellent teachers with rich international Chinese-teaching experience to conduct lessons. The teaching materials, script design and character activities used in the shooting are all derived from the international Chinese-teaching practice. The classroom activities presented in the course are easy and natural, the topics are real and interesting, and the resources and information are abundant. It can not only be directly used as a supplement in classroom teaching but also meet TCSOL's needs for further education. 1 Boutique courses Change it Chen Wei, a young seal cutting artist, and Qianyin Hall - intangible cultural heritage A foreigner speaks Chinese | Why did handsome boys vied to imitate "eunuch voice"? - Chinese Bridge for College Students A day of a young potter - art National Style Eulogizing: The Book of Songs · Wei Feng · Qi Ao A foreigner speaks Chinese | Which Chinese popular songs can foreigners remember? - Chinese Bridge for College Students Use of resultative complement (II) Phuket Confucius Institute, Thailand Jiao Xiaoling #Initial consonant#Lesson Two (I) [Teaching in English] Dolphin Baby series lessons - Baby Squirrel Comments Submit All comments You have no courses yet, please go to to find them.

Happy Chinese - Lesson Eleven Wang Lingyu 20 Learned 2021-07-08 Shot on China Teacher：汪玲玉 （Asia · China） Target audience：Teenager Difficulty：Easy Direction：Chinese Learning Upload time：2021/07/08 Tags: Happy Chinese Subscribe This course is based on the second volume of Happy Chinese and selects excellent teachers with rich international Chinese-teaching experience to conduct lessons. The teaching materials, script design and character activities used in the shooting are all derived from the international Chinese-teaching practice. The classroom activities presented in the course are easy and natural, the topics are real and interesting, and the resources and information are abundant. It can not only be directly used as a supplement in classroom teaching but also meet TCSOL's needs for further education. 1 Boutique courses Change it Dolphin Baby series lessons - Nutcracker #Baduanjin# Lesson Two [Teaching in Spanish] National Style Eulogizing: The Book of Songs · Wei Feng · You Hu National Style Eulogizing: The Book of Songs · Yong Feng · Zai Chi Happy Chinese - Lesson Twenty-three Zhang Xinsiyi A foreigner speaks Chinese | I want to dance on the land of China - Chinese Bridge for Middle School Students Word series: Interpret "door" A foreigner speaks Chinese | Which two poems do "Yuefu Shuangbi" refer to? - Chinese Bridge for College Students Comments Submit All comments You have no courses yet, please go to to find them.

A foreigner speaks Chinese | Which two poems do "Yuefu Shuangbi" refer to? - Chinese Bridge for College Students 2 Learned 2021-06-18 Teacher：ChinesePlus （Asia · China） Target audience：Teacher Difficulty：Easy Direction：Chinese culture Upload time：2021/06/18 Subscribe 0 Boutique courses Change it Pomegranate chicken - delicacy A foreigner speaks Chinese | The Yunnan mountain village love between a Beijing girl and a Dutch guy - Chinese Bridge for Middle School Students Happy Chinese - Lesson Twenty Zhang Xinsiyi A foreigner speaks Chinese. Do you know what "Wildfire in July" means? National Style Eulogizing: The Book of Songs · Yong Feng · Jun Zi Xie Lao Dolphin Baby series lessons - Where Has the Forest Gone National Style Eulogizing: The Book of Songs · Bei Feng · Jing Nv A foreigner speaks Chinese. Be united and companionate, not naughty. Spank those who do not speak Chinese Comments Submit All comments You have no courses yet, please go to to find them.

Happy Chinese - Lesson Sixteen Wang Lingyu 14 Learned 2021-07-07 Shot on China Teacher：汪玲玉 （Asia · China） Target audience：Teenager Difficulty：Easy Direction：Chinese Learning Upload time：2021/07/07 Tags: Happy Chinese Subscribe This course is based on the first volume of Happy Chinese and selects excellent teachers with rich international Chinese-teaching experience to conduct lessons. The teaching materials, script design and character activities used in the shooting are all derived from the international Chinese-teaching practice. The classroom activities presented in the course are easy and natural, the topics are real and interesting, and the resources and information are abundant. It can not only be directly used as a supplement in classroom teaching but also meet TCSOL's needs for further education. 1 Boutique courses Change it Going around the city Dolphin Baby series lessons - The Little Ant Wears Shoes Artist Cui Xiuwen - art A foreigner speaks Chinese | The Chinese Bridge is our bridge of happiness - Chinese Bridge for Middle School Students Happy Chinese - Lesson Seven Wang Lingyu A foreigner speaks Chinese. I am the best, I deserve better! Word discrimination: "often" and "usually" (II) A foreigner speaks Chinese. A listening examination for foreigners to wait until the end of time Comments Submit All comments You have no courses yet, please go to to find them.

Happy Chinese - Lesson Twenty-one Zhang Xinsiyi 15 Learned 2021-07-09 Shot on China Teacher：张新斯贻 （Asia · China） Target audience：Teenager Difficulty：Easy Direction：Chinese Learning Upload time：2021/07/09 Tags: Happy Chinese Subscribe This course is based on the second volume of Happy Chinese and selects excellent teachers with rich international Chinese-teaching experience to conduct lessons. The teaching materials, script design and character activities used in the shooting are all derived from the international Chinese-teaching practice. The classroom activities presented in the course are easy and natural, the topics are real and interesting, and the resources and information are abundant. It can not only be directly used as a supplement in classroom teaching but also meet TCSOL's needs for further education. 0 Boutique courses Change it Key word of Changsha (2) Foodie Paradise Happy Chinese - Lesson Nineteen Wang Wenchang A foreigner speaks Chinese | Who are the protagonists of the story of "make painstaking efforts"? - Chinese Bridge for College Students National Style Eulogizing: The Book of Songs · Wei Feng · Qi Ao Ceramist Zhang Yalin - art Happy Chinese - Lesson Fifteen Wang Wenchang #Tone# (I) [Teaching in Spanish] Small class of Thai Session VIII - Alarm Comments Submit All comments You have no courses yet, please go to to find them.

A foreigner speaks Chinese | You probably can't write the bone-shell inscription of the character "good" - Chinese Bridge for College Students 1 Learned 2021-06-18 Teacher：ChinesePlus （Asia · China） Target audience：Teenager Difficulty：Easy Direction：Chinese culture Upload time：2021/06/18 Subscribe 0 Boutique courses Change it A foreigner speaks Chinese | Do you still remember the girls of Ali Mountain who are as beautiful as water? - Chinese Bridge for College Students Dolphin Baby series lessons - The Wonderful Sun Compound finals San Simón Confucius Institute, Bolivia Spanish version Lesson One (I) Wang Yi A foreigner speaks Chinese | The pretty and intelligent German sisters competed together - Chinese Bridge for Middle School Students Word series: Interpret "day" Greetings for Spring Festival #Elementary business Chinese# Lesson Five (I) "I want a Mapo Tofu" [Teaching in English] Lesson 16 Loy Krathong festival in Thailand is extremely romantic! Comments Submit All comments You have no courses yet, please go to to find them.

A foreigner speaks Chinese | Walking into the "three-dimensional encyclopedia" in Yunnan - Chinese Bridge for Middle School Students 1 Learned 2021-06-18 Teacher：ChinesePlus （Asia · China） Target audience：Teacher Difficulty：Complex Direction：Chinese culture Upload time：2021/06/18 Subscribe 0 Boutique courses Change it Dragon-shaped carrot salad - delicacy National Style Eulogizing: The Book of Songs · Wei Feng · Zhu Gan #Tone# [Teaching in English] Dolphin Baby series lessons - Wonderful Grain Dolphin Baby series lessons - Postmen #Tone# (II) [Teaching in Spanish] A foreigner speaks Chinese | A foreign boy interpreted the allusion "Speak of Cao Cao and he will appear ~" - Chinese Bridge for College Students A foreigner speaks Chinese | You probably can't write the bone-shell inscription of the character "good" - Chinese Bridge for College Students Comments Submit All comments You have no courses yet, please go to to find them.

Home / All case / 词汇教学的方法与技巧 Collection Share 微信扫一扫：分享 微信里点“发现”，扫一下 二维码便可将本文分享至朋友圈。 Download Package ID： f5a757df-c118-11eb-a374-00163e127b38 Author： ChinesePlus Upload Date： 2021-05-31 Classification： Chinese Linguistic Knowledge Region： Europe Viewed： 15915 Downloaded： 409 Collection： 0 Label： 词汇 Case Notice： 本节课的主要内容包括：1.词汇教学的原则（系统性原则、阶段性原则、交际性原则、文化性原则）2.词汇教学的方法（生词展示顺序及方法、词语释义的方法、词语的练习与巩固）3.词汇教学的技巧（营造良好的课堂气氛等）4.词汇教学中应注意的问题。通过以上四部分内容的讲解，能够使教师系统地学习词汇教学的方法和技巧，并且学以致用。 Case Material： All Categories 1990.mp4... Select All Download Latest comments： All comments No comment Related to the case： 对外汉语教学设计及长城汉语特色PPT制作（第一部分） Chinese Linguistic Knowledge 对外汉语教学设计及长城汉语特色PPT制作（第二部分） Chinese Linguistic Knowledge 汉语体验课 Chinese Linguistic Knowledge 对外汉语教学设计及长城汉语特色PPT制作（第三部分） Chinese Linguistic Knowledge Case review 词汇教学的方法与技巧 Release Message Board Requests Suggestions Complaints release Message has been sent successfully, we will reply as soon as possible within 48 hours! Help The title specification: 1. Accuracy: clearly describe the general outline of the article 2. Concise: the title should not be too long 3. Novelty: the title should be unique 4. Number of words: 4-40 Cases Release Specification: Content requirements： 1. Framework requirements A case should consist of five parts: background, theme, context, result, and analysis. Background: The case should explain the relevant circumstances of the story: time, location, characters, cause of the event, etc. Theme: The case must have a theme. It is recommended to start the case from the most rewarding and enlightening prospective, and then choose and establish the theme. Context: Go through all the original materials of the case and select the targeted content. Results: The case should explain the teaching ideas, describe the teaching process, and explain the teaching outcome, that is, the immediate effect of such teaching measures, including students' reflections and teachers' feelings. Comment and analysis: The author must have certain opinions and analysis on the topics and content reflected in the case, including the teaching methodology, process, results, and its pros and cons. 2. Content Requirements The Chinese national flag, national anthem, national emblem, map, etc., should be used correctly in all case materials. For map usage, please do refer to "Standard Map Service System"; Please avoid comparisons involving ideological issues and national values; Please avoid the following content: Content that shows ugly behaviors, vulgar languages, or horrifying scenes; content that destroys the ecological environment, hunts and kills indiscriminately, or abuses animals; content that insults, slanders, derogates, or spoofs others; content that is not supportive to the positive development of children, such as smoking, alcoholism, fighting, drug abuse, or gambling, etc.; content that violates personal privacy; content that infringes the intellectual property rights of others; other content prohibited by the laws and regulations of China and the country where the teaching is located; content that involves major natural disasters, accidents, terrorist incidents, wars and other disaster scenes; content of trademarks or advertisements involving commercial value; countries in the world and religious taboo content. Production requirements: Cases are divided into two types: text cases (text/pictures/charts, etc.) and multimedia cases (video/audio, etc.). 1. Text case There is no intellectual error or typo; all pictures used are clear and without copyright issues. 2. Multimedia case File format: the video resolution is not less than 1920×1080 pixels; the video bit rate is not less than 8Mbps; the audio sampling rate is 48kHz; the video format is mp4 or mov; a single file size is less than 2G. Image quality: The image should have good lighting conditions, low noise, reasonable white balance, aperture, exposure compensation and other parameters; the lens should be stable without jitter; the image should be filmed with horizontal screen with accurate focus; audio and video should be well synchronized; teachers should dress-up appropriately; no logo should be showed in the image; no obvious clipping error should be found. Sound quality: The background should be quiet without echo; the sound has no obvious distortion; the sound volume is stable with no obvious noise; the accompanying sound is clear, full, and mellow; there is no obvious proportion between the character dialogue and the live sound; there is no obvious dis-proportionality between the character dialogue and the background music. Cover specification: 1. The picture should be clear 2. The cover image must be consistent with the content 3. Comply with relevant laws and regulations 4. The cover image is completely displayed 5. The size of the cover image is not more than 5M The selection of high-quality cases must meet the following content standards: 1. Concise topic selection: The topic shall be conducive to teaching. The selected topic should be closely linked to the syllabus, focusing on a certain knowledge point, teaching activities, cultural activities, etc.. The topic selection should be brief and clear. 2. Typical topic selection: the topic should be positioned accurately with features. The case should be designed around common, typical, and representative problems or content in daily teaching or learning. The case should effectively explain key language points, and solve difficult problems as well as doubts in teaching and learning practice. 3. Correct on knowledge: the knowledge points and grammatical points in the case are rigorously described; the text, symbols, units and formulas are in line with national standards and publication specifications; the work is free of copyright infringement and is not oriented to sensitive content; the national flag, national anthem, and national emblem are correctly used according to relevant regulations. Regarding to any map usage, please refer to "Standard Map Service System http://bzdt.ch.mnr.gov.cn". 4. Goal achievement: The case should be convenient for teachers to apply in teaching practice, with good versatility and strong interaction. It can effectively solve practical learning and teaching problems, efficiently achieve the teaching subjective, and support the development of learners' knowledge and ability. Video cases must also meet the following technical standards: 1. File format: the video resolution is not less than 1920×1080 pixels; the video bit rate is not less than 8Mbps; the audio sampling rate is 48kHz; the video format is mp4 or mov; a single file size is less than 2G. 2. Image quality: The image should have good lighting conditions, low noise,reasonable white balance, aperture, exposure compensation and other parameters; the lens should be stable without jitter; the image should be filmed with horizontal screen with accurate focus; audio and video should be well synchronized; teachers should dress-up appropriately; no logo should be showed in the image; no obvious clipping error should be found. 3. Sound quality: The background should be quiet without echo; the sound has no obvious distortion; the sound volume is stable with no obvious noise; the accompanying sound is clear, full, and mellow; there is no obvious proportion between the character dialogue and the live sound; there is no obvious dis-proportionality between the character dialogue and the background music. Exquisite Case Evaluation Criteria The selection of high-quality cases must meet the following content standards: 1. Concise topic selection: The topic shall be conducive to teaching. The selected topic should be closely linked to the syllabus, focusing on a certain knowledge point, teaching activities, cultural activities, etc.. The topic selection should be brief and clear. 2. Typical topic selection: the topic should be positioned accurately with features. The case should be designed around common, typical, and representative problems or content in daily teaching or learning. The case should effectively explain key language points, and solve difficult problems as well as doubts in teaching and learning practice. 3. Correct on knowledge: the knowledge points and grammatical points in the case are rigorously described; the text, symbols, units and formulas are in line with national standards and publication specifications; the work is free of copyright infringement and is not oriented to sensitive content; the national flag, national anthem, and national emblem are correctly used according to relevant regulations. Regarding to any map usage, please refer to "Standard Map Service System http://bzdt.ch.mnr.gov.cn". 4. Goal achievement: The case should be convenient for teachers to apply in teaching practice, with good versatility and strong interaction. It can effectively solve practical learning and teaching problems, efficiently achieve the teaching subjective, and support the development of learners' knowledge and ability. Video cases must also meet the following technical standards: 1. File format: the video resolution is not less than 1920×1080 pixels; the video bit rate is not less than 8Mbps; the audio sampling rate is 48kHz; the video format is mp4 or mov; a single file size is less than 2G. 2. Image quality: The image should have good lighting conditions, low noise,reasonable white balance, aperture, exposure compensation and other parameters; the lens should be stable without jitter; the image should be filmed with horizontal screen with accurate focus; audio and video should be well synchronized; teachers should dress-up appropriately; no logo should be showed in the image; no obvious clipping error should be found. 3. Sound quality: The background should be quiet without echo; the sound has no obvious distortion; the sound volume is stable with no obvious noise; the accompanying sound is clear, full, and mellow; there is no obvious proportion between the character dialogue and the live sound; there is no obvious dis-proportionality between the character dialogue and the background music. Agree Disagree