The outbreak of the COVID-19, the number of confirmed cases continues to rise, and colleges are postponed, but classes are not suspended or suspended, which requires teachers to learn to utilize existing network resources and actively carry out online teaching. Rain class is loved by front-line teachers because of its simple interface and easy operation. This article takes rain class as an example. Through simple five steps, it helps zero-based teachers to realize online teaching, and offer a simple and effective solution for the majority of front-line teachers.

An outbreak of COVID-19 hits China at the end of 2019. In analytical chemistry teaching, we try to combine the hot issue with the main points of frontier research areas, for example, nucleic acid detection of new coronavirus, and inspire the students to think deeply and understand the basic requirements of analytical chemistry. Taking advantage of online teaching resources, the authors make some attempts in the teaching process.

Due to the needs of control and prevention of novel coronavirus epidemic, "online teaching" is suggested to assure a steady, orderly and efficient teaching work during the postponed starting of the new semester. Based on the Rain Classroom and Tencent Meeting softwares, this paper discusses the practice of "online teaching" of structural chemistry from the perspectives of pre-class preparation, teaching methods and contents, and after-class counseling.

In response to the 2019-novel coronavirus pneumonia epidemic, teachers are actively exploring effective online teaching methods through online live broadcast and online interactive discussions, so as to provide a good learning experience for students who are studying at home. This paper takes the course of "inorganic chemistry and chemical analysis" as an example, facing the particularity during the epidemic, the former "online-merge-offline" hybrid teaching mode is adjusted accordingly to "full online" remote hybrid teaching mode, so as to realize real-time and high-efficiency teaching effect in different places.

Due to the epidemic situation of the novel coronavirus pneumonia, the opening of classes for colleges and universities has been postponed. We need to launch online teaching in order to achieve the goal of "non-stop teaching, non-stop learning". Based on the superstar learning platform, the teaching practice of the recording and broadcasting for organic chemistry course has been carried out, to provide some reference for teachers in colleges and universities.

The outbreak of COVID-19 led to the closing of the schools. Teaching and studying will not be interrupted although teachers and students are out of school. Online teaching is a good approach to address this challenge. This article describes our online teaching of organic chemistry enabled by the Pedagogy Square and Live Video-based strategy. With the help of the Pedagogy Square platform, teachers can upload teaching resources, such as handouts and test sheets. Students can download all teaching resources and finish the assignments posted by the course instructors. Live Video room is used as a virtual classroom. All activities, communications and interactions in a conventional classroom can be even better realized in this virtual classroom. This online strategy is an alternative to classic in-class teaching not only during the outbreak of COVID-19, but also under other situation when normal class settings are not available.

In the wake of the intensifying novel coronavirus epidemic nationwide, a number of universities and colleges have postponed the start of the spring semester. However, education continues via online platforms during disease outbreak, which also offers an opportunity to explore the new teaching model. This paper reviewed how to set up "double-teacher online class" to carry out targeted teaching tutorials via DingTalk software.

In order to prevent the spread of new coronavirus (COVID-19) outbreak and respond to the Ministry of Education's call for "postponement of school without suspension of learning", we firstly analyzed the two students' problems and three teacher's misunderstandings in online teaching, and then compared the advantages and disadvantages of different live broadcast platforms. Some suggestions for online teaching were subsequently proposed. Online teaching guidance based on "Chaoxing live broadcast + Xuexitong" was offered as an example for online teaching.

At the beginning of the New Year in 2020, Corona Virus Disease 2019 (COVID-19) suddenly swept across the country. In order to prevent the infection caused by crowd, "Suspended classes but not stop teaching and learning" was proposed by the Ministry of Education. Students in local colleges and universities show obvious variations in self-discipline, consciousness and initiative. Such a practical situation brings us a great challenge to effectively carry out the online teaching for chemistry major. Taking the online teaching of "Materials Chemistry" as an example, this paper introduces the process of online teaching of chemistry major in the local universities. In view of the problems encountered in the teaching process and the solutions adopted, this paper summarizes the issues needing attention during the online teaching. It is hoped that this paper can provide some useful reference for the online teaching of chemistry major in local colleges and universities.

The analytical chemistry course team of China University of Geosciences (Wuhan) successfully carried out the online teaching of analytical chemistry course by using national high-quality online open course as the course resource, MOOC classroom as the smart teaching tool, and QQ group as the platform for online teaching and tutoring. The practice shows that online teaching based on the combination of China University MOOC, MOOC classroom and QQ group has been well received and favored by students, who are generally easy to accept and highly motivated to participate. This practice shows good teaching effect at the beginning.

During the wide spread of new coronavirus pneumonia, how to use information technology for carrying out the effective online teaching is an important question and discussion among teachers and students. Instrumental Analysis is an important basic course for the college students majoring in chemistry. In the time when teachers and students can only "hear" or "meet" online, how do we ensure the quality of online teaching? Taking the introduction part as an example, the author presents the process and fruits of their efforts to achieve better teaching and learning quality.

2020 spring semester has been postponed due to the novel coronavirus outbreak in China. The teaching group of Basic Chemistry 2 in Beihang University has offered a practical proposal for online course. This proposal takes all measures to make sure the successful teaching activity, including MOOC, effective communication among teachers and students, great teaching group work, database of teaching materials and mixed teaching strategy.

In order to combat the impact of the new coronavirus-infected pneumonia epidemic (COVID-19) on normal school opening and classroom teaching, our analytical chemistry department actively responded to the initiative, quickly prepared and built an online MOOC teaching activity using the school multi-level information-based learning platform, to ensure the teaching arrangement during the deferred semester, and help and guide students to complete this course with high quality and efficiency. This article analyzed from the four aspects, including fast construction of analytic chemistry courses and their characteristics, learning and management with the school curriculum platform, auxiliary teaching with WeChat group, QQ group or public mailbox, and students' using effects and learning requirements. We hope to provide a data support for new teaching methods exploration, in order to improve the teaching quality of analytical chemistry, so as to complete the teaching and learning with students, and obtain ideal results.

During the fight against the new coronavirus epidemic, the "Physical Chemistry" team of Beijing Normal University used various network platforms and tools, such as MOOC of China University, Rain Classroom and WeChat Group in the teaching process. The exploration and practice of online learning of "Physical Chemistry" is carried out based on MOOC teaching, with student learning as the center and teacher guidance as the support. Taking the most difficult chapter of "fundamentals for statistical thermodynamic" as an example, we designed a complex teaching program that includes previews, watching MOOC videos in class, real-time online exercises, teachers' answers, and after-class reflection and questioning. The students were encouraged to learn independently through the reserved information, designed activities and assignments. Practice shows that the online course has cultivated the students' self-management ability, trained their critical thinking skills, and achieved good teaching results.

Remote teaching and learning have been adopted during the COVID-19 outbreak. In this particular period of time, a totally-online-teaching strategy was implemented by the teaching team of physical chemistry in Tianjin University. With the enrichment of learning resources, the optimization of the inspectors' teaching skills, as well as the elaborated managements of the whole learning process, the course has been given online successfully, though it is thought unsuitable for online teaching due to the abstruse theory and complex mathematical treatments involved in teaching. Both the central position of student and the leading role of teacher are greatly promoted in the newly developed totally-online-teaching process. The experiences obtained in this teaching process will lay great impact on teaching mode innovation in the future.

Online teaching is an important measure to carry out the "no suspension of classes" during novel coronavirus pneumonia, how to make online teaching more effective is currently the major problem. In this paper, selecting Tencent Meeting and Ketangpai as the teaching platforms, complementary with the respective advantages of the other process evaluation platforms, a new form of online teaching of organic chemistry courses was built by three approaches including reorganizing teaching resources, innovating teaching activities and reforming teaching evaluation. It provides reference for the effective implementation of online teaching.

Online laboratory teaching with multiple dimensions was implemented based on the virtual simulation laboratory teaching project, combined with Blackborad (Bb) teaching platform and online communication media such as Tencent classroom/Tencent conference, so that students can have a three-dimensional "online laboratory class". It not only solved the laboratory teaching problem during the prevention and control period of the new coronavirus, but also expanded the form and improved the quality of laboratory teaching.

Aiming at the requirement of "suspending classes without stopping learning" in the epidemic situation of new coronary pneumonia, a variety of information technologies were used to construct a cloud classroom of inorganic chemistry. How to use Tencent classroom, Superstar learning and WeChat public account to construct this "inorganic chemistry" cloud class was introduced. The teaching effect of Inorganic Chemistry was discussed.

Finding Chemistry in Detective Conan is a Massive Open Online Course (MOOC) offered by Central South University. Under new coronavirus pneumonia, the curriculum team launched a series of student-centered innovative teaching methods based on the existing MOOC Video teaching resources and curriculum features. At the same time, the advantages of various network information platforms such as MOOC, QQ group and Sojump.com were also introduced to create a wonderful Internet plus classroom, which enhanced students' sense of "learning" and strengthened the teaching of teachers' guiding, promoting students' active learning.

Because of the outbreak of COVID-19, the course 'Analytical Chemistry II' is taught via online for the 2019-2020 spring semester. During the process, materials from various sources are successfully incorporated into the teaching. Particularly, the detection, therapy, drug development for COVID-19 are all tightly related to analytical chemistry. With introduction of these correlative multimedia materials into the teaching and learning practice, we can help the students better understand the concept of analytical chemistry. It is a beneficial attempt for combination of online and offline teaching in the future.

In the online organic chemistry and laboratory courses, the open or semi open quizzes before class and after class are adopted to explore the "dual quizzes teaching" mode on the network teaching platform. As the progress of "dual quizzes teaching", students' learning weakness, confidence and enthusiasm are improved continuously. Through the analysis of online students' learning data, questionnaire and interactive feedback, the teachers can evaluate the learning situation of the students and regulate instructional content in time. As a result of teaching online, the "dual quizzes teaching" mode has achieved highly positive effect.

It has been two months since a boom of online education triggered by the epidemic in China. At present, we are keeping focus on how to optimize our online class. In the case of chemistry laboratory courses, there's not much that can be done to experimental operations through online teaching. While for the traditional teaching procedure, there is still room for improvement in terms of integrating research to teaching, interactivity, etc. This paper will present some design strategies for improving teaching the organic chemistry laboratory online. To be specific, it describes how teaching materials like the lesson plan and virtual lab were coordinated into the online teaching. And we will also discuss the holistic approach to a better outcome for students' active learning and integration research into teaching by redesigning multiple phases, such as the pre-laboratory preparation, live online class, experimental operations.

The online teaching of chemistry and society course has been successfully carried out by using national high-quality online open course as the course resource and Superstar Learning Platform for online teaching. The practice shows that online teaching based on the combination of China University MOOC, and Superstar Learning Platform has been well received by students, who are generally easy to accept and highly motivated to participate. This practice shows good teaching effect.

During the special period in the epidemic COVID-19, the five-step online teaching mode focusing on learning outcome of students has been constructed based on the national high-quality MOOC in physical chemistry and various network technologies (i.e. MOOC class, Tencent QQ group and meeting platform), which is "guide to learn boost, self-study by MOOC, online testing, timely feedback, advanced discussion". It has been demonstrated that diversified online interactive teaching strategies can effectively promote the online teaching quality, through teachers giving full play to the leading roles, encouraging and guiding students to participate in the whole online teaching process.

In early 2020, because of the outbreak of COVID-19, students are unable to return school on time and normal teaching activities are postponed. In order to implement the requirement of "No suspension of classes" proposed by the Ministry of Education, and to ensure the teaching quality at the same time, the coordination chemistry teaching team from Nanjing University successfully carried out the exploration and practice of online teaching of coordination chemistry by using the MOOC of coordination chemistry on "Wisdom Tree" platform as the curriculum resource, QQ Live or Tencent Meeting as the online teaching tool and Pedagogy Square as the intelligent teaching platform. This teaching form reorganizes and optimizes the available resources online, and implements the student learning process evaluation and the teacher teaching evaluation. The feedback from students and teachers indicates the success of this teaching form.

When the course was online this semester because of the outbreak of COVID-19, we explored a way to help students thinking as a chemist via home lab. We focused on the student-centered teaching method instead of the teacher-centered one, which was named as "I-Think-Talk-Do it myself" and "You talk-I do", respectively. It is demonstrated that home lab is an efficient way to raise students' interest in chemistry and improve their research abilities, including the abilities to summarize literatures, design and optimize an experiment, observe, identify and solve problems. The teaching results and the feedback from students were also discussed.

During the outbreak of COVID-19, the teaching team of chemical engineering principles experiment of Nanjing University uses Tencent Meeting and Pedagogy Square as online platforms, applies the unit operation experiment MOOC particularly designed by our course team, and introduces the simulation software of Oubeier Cloud Classroom and Es-online. The online classroom delivers equivalent teaching as the offline classroom.

The spring semester of 2020 is affected by the new coronary pneumonia epidemic, which prevents the normal classroom teaching of universities in China. Nankai University actively responds to the request of "Suspended classes but not stop teaching and learning" proposed by the Ministry of Education. The online teaching software such as "Rain Classroom" and "Tencent Meeting" are used to provide online teaching to undergraduate students. This article takes organic chemistry teaching as an example and introduces the implementation process and effectiveness of online teaching. According to the particularity of online teaching, teachers must change the teaching mode to ensure the teaching work carried out effectively.

Based on the analysis of the courses and the investigation of students' online learning needs, an online teaching mode of "Tencent Classroom" and "Rain Classroom" with "split screen" is designed. This mode is used for the online teaching of "Foundation of Innovation and Entrepreneurship" and "Chemical Instrumentation and Automation". After two months of teaching practice, the teaching and learning were reflected and summarized, aiming to improve the performance of online teaching.

Under the guidance of the "Classes are suspended but teaching and studying is in progress" put forth by the Ministry of Education in response to the epidemic of novel coronavirus pneumonia, colleges and universities responded positively. This article analyzes the problems of online teaching in local universities such as single teaching styles, variated online teaching skills of teachers, teaching concepts need to be changed and inadequate online learning capabilities of students. Strategies for improving the quality of online teaching are introduced from university, teacher and student levels, respectively. Taking the teaching of electrochemical basis as an example, the specific application of online resources and platforms in teaching practice and the results achieved are introduced in detail. It can provide a reference for university teachers to carry out the teaching with online resources.

In order to achieve "postponement of school without suspension of learning" during the prevention and control of new coronavirus pneumonia, the online teaching strategy was constructed based on Enterprise WeChat and Integrated Online Education Platform for the online teaching of Separation Science and Technology. The student-centered teaching methods were applied in online teaching process.

Since the outbreak of novel coronavirus pneumonia (NCP) at the beginning of this year, Chinese government acted immediately and made some regulations to control the epidemic NCP and promote the recovery of society and industry including education. Chinese universities stayed on the online courses without suspension on teaching and learning. Herein, we report online teaching of structural chemistry course based on the teaching mode of online live broadcast platform, online course resources and management platforms ("1 + 2" mode). This may promote online teaching, and take advantage of online live broadcast and massive open online courses, which achieves good teaching and learning experiences on structural chemistry course.

Due to the outbreak of the COVID-19 epidemic, the new semester has been postponed. But in order to continue teaching and student training work, teachers from colleges are efficiently utilizing internet education resources, and actively carry out online teaching. This paper uses one of the virtual simulation experiment projects at Shandong University, as an example. It introduces how to conduct online laboratory training and teaching in inorganic and analytical chemistry laboratory by utilizing the combination of virtual simulation experiment projects and online resources, and help student learn the theory and operation of iodometry titration.

During the battle against COVID-19 epidemic, the inorganic chemistry teaching team of Jilin University carried out online teaching of student-centered "inorganic chemistry Ⅱ" course based on "inorganic element chemistry" MOOC with Chaoxing learning platform and QQ group as the auxiliaries. Through the big data support and interactive communication section of Chaoxing learning platform, the learning situation of students in the three learning links of "pre-class, in-class, after-class" was timely tracked and analyzed. Practice showed that online teaching could accomplish teaching and learning effectively.

This paper describes the whole process of online teaching of Unit Operations of Chemical Engineering by QQ split screen and supernovae learning. The pre-class preparation, online teaching mode and using skills are presented in detail. Moreover, the processing schemes are presented to deal with the key problems and students' questions. It can help teachers with zero online teaching experiences implement online teaching, which certainly provides alternative methods for teachers.

Taking the online teaching of "inorganic chemistry" course at Dezhou University as an example, the "six steps before class, six steps in class, six steps after class" online course teaching model based on "Rain Class + Dingding Live" and an online "short class" were constructed. The main content and implementation methods of teaching design, teaching process, teaching effect, teaching reflection, teaching evaluation in online course teaching were discussed. It has been proved in practice that this model can effectively improve students' learning interest and enhance teaching effects.

During the outbreak of COVID-19 epidemic, considering the characteristics of being an English course, the "Green Chemistry" teaching team of Sichuan University has built a multi-dimensional teaching platform based on Chaoxing Fanya platform, QQ group, QQ group class, So Jump platform, station B and WeChat official accounts, to optimize the whole teaching process from the three links of preparation before class, on-line teaching, feedback after class. Student-centered teaching was carried out by the form of flipped learning based on task-driven cooperative learning. It is found that the students have been encouraged by task-driven cooperative learning, and their English ability, professional quality, as well as high-order thinking skills such as analysis, evaluation and problem solving are improved.

Under the case of novel coronavirus (COVID 19), and in response to the Ministry of Education's call for "postponement of school without suspension of learning", online teaching should be equivalent to the real class teaching. Based on Chinese University MOOC platform, this paper establishes SPOC on campus with the open online course Organic Chemistry as the online learning resource. Before class, students learn online video and self-testing. The teacher will answer questions and interact with students through live broadcasting. The student will practice and consolidate after school. "One-stop" solves the learning needs of the three stages of online flipped classroom and demonstrates online flipped classroom teaching effect.

This paper aims at the implementation of the online courses of chemistry majors in Sichuan University in response to the epidemic, and explores a more effective and reasonable way to organize teaching. Based on the investigation and feedback of teachers and students, this paper points out the difficulties and challenges of online teaching at the present stage:the classroom interaction and discussion are not smooth, the online teaching tools and methods are diversified, and the chemistry laboratory courses are not matched. Therefore, the School of Chemistry of Sichuan University will coordinate the online teaching platform, enhance the classroom interaction, and launch the "chemistry virtual simulation experiment teaching center" to ensure the teaching progress and quality during the epidemic prevention and control.

Original teaching schedules were suspended in response to COVID-19 epidemic. The Chemical Experiment Teaching Center of University of Science and Technology of China adjusted the teaching plan in time, and carried out online assisted teaching based on "one lesson one policy" teaching scheme. The preliminary effect of using MOOC and virtual simulation experiments, which had already been built in the early stage, were discussed in this paper.

2020 spring semester has been postponed due to the novel coronavirus outbreak in the world. Taking the valence bond theory of coordination compound of "Inorganic Chemistry" as an example, we redesign and adjust the former hybrid teaching mode in view of the problems encountered in the online teaching and learning. The practice shows that the online hybrid teaching mode has cultivated the students' self-regulated learning ability, provided a good learning experience for students, and achieved good teaching effect.

Based on the platform of "QQ share screen + video live broadcast", through the combination of "online theory teaching", "development of home alternative experiment", "game type" experimental operation and "virtual simulation experiment", we carried out the online teaching of polymer material synthesis innovation laboratories, integrating "theory + practice" and "virtual + reality", which is also a good opportunity for labor education. These explorations and practices are expected to provide some references for online teaching of chemical laboratory courses during the COVID-19 epidemic.

Owing to the control and prevention of novel coronavirus, "online teaching" is generally suggested. The online teaching quality depends on teaching skills and students' enthusiasm. The teaching practice of structural chemistry based on teaching and research activities, electronic records, group sharing and course ideology are introduced.

During the suspending of education for prevention and control of COVID-19 epidemic, chemistry majors in colleges and universities actively responded to the requirements of the Ministry of Education that "class is suspended without stopping teaching, class suspension without learning suspension", and earnestly organized online teaching. The National Instructional Committee of Chemistry Higher Education designed three questionnaires for chemistry majors, teachers and students to make survey on the online teaching. Through analysis of the survey, some important problems and suggestions are put forward. It is of significance to promote the future online education and teaching reform of relevant courses of chemistry majors.

The COVID-19 broke out on a large scale, and online teaching became the first choice for teachers. Avoiding network congestion and ensuring learning effects are the dilemmas faced by online teaching. With the help of the UOOC platform and the Tencent Classroom, taking the "Polymer Structure and Performance" course as a sample, we suggested a new "online asynchronous teaching" model. Among them, the SPOC course is convenient for students to manage their learning time; "Chapter Quiz" and "Student-to-Student Mutual Evaluation" are helpful for students to obtain multi-angle feedback; project tasks are focused on case analysis so that students carry out inquiry-based learning. Overall, the "online asynchronous teaching" model breaks the time and space restrictions on teaching and learning, guarantees the quality of teaching during the epidemic, and lays the foundation for creating a "golden class".

This paper introduces our initial attempt and practice to carry out online teaching during the period of prevention and control of the new type coronavirus (COVID-19). Online teaching in our college generally adopts three means:MOOC network platform, QQ group and Tencent classroom live broadcast platform. This paper introduces in detail the online teaching, guiding students to participate in discussions, and the effective control of online teaching and effective combination of expertise and epidemic knowledge. The achievements were satisfied.

Due to COVID-19, all the universities in China has postponed their spring semester. The Ministry of Education issued a call "suspending classes without stopping learning" to require universities to carry out online teaching actively. Up to now, Online teaching has been implemented for nearly eight weeks, and teachers are familiar with online teaching methods. Then, how to hold online courses efficiently and refine course resources have become the main tasks for teachers. This paper elaborates on the practice and skills of rapid improvement of online course and interactive teaching based on "Chaoxing fanya platform and Xuexitong". Using these skills can not only reduce the workload of teachers, but also build high-quality online courses to ensure teaching quality and objectives. This paper could provide a reference for college teachers to implement online teaching efficiently.

Owing to the outbreak of novel coronavirus pneumonia, the opening of spring semester is postponed, but teaching is not suspended, which requires teachers to utilize the network platform for online teaching smoothly. How to ensure the quality of teaching and learning has become a big challenge. In this paper, taking Chaoxing Fanya platform as an example, the construction of an online open course of organic chemistry for students of biology major is introduced.

During the outbreak of novel coronavirus pneumonia, teaching reformation in the principles of chemical engineering online course was carried out. The teaching means was secondary researched and developed. The chemical professional software was used in online teaching. And the combination of life instance and chemical process principle improved the teaching effect. Through the reform attempt, students' interest in the course and their understanding of abstract chemical process is improved. The students' theory is enriched, which lays a foundation for the future development of mixed online and offline teaching.

In response to the COVID-19 epidemic prevention, the "polymer chemistry" course teaching team actively explored the "learning-centered" online teaching model. The students were guided to active learning by using the rich contents of Chaoxin online teaching platform and multiple online teaching activities. The basic knowledge points, difficulties and emphases of the teaching were highlighted and the real-time communication and Q&A were achieved in combination with the Tencent course live broadcast and QQ learning group. Following the concept of "students as the main body and teachers as the leading", the online teaching of "polymer chemistry" has effectively aroused the students' interest in learning, cultivated the initiative of autonomous learning, organically integrated the ideological and political education, and achieved a good learning outcome.