The increase in the number of cases of COVID-19 spreading to various countries took place quickly and in a short time. As of July 9, 2020, WHO reported 11,84,226 confirmed cases with 545,481 deaths worldwide (Case Fatality Rate/CFR 4.6%). Indonesia reported its first case on March 2, 2020. Cases are increasing and spreading rapidly throughout Indonesia. Until July 9, 2020. As of August 19, 2021, the total confirmed cases of COVID-19 in the world are 209,201,939 cases with 4,390,467 k deaths (CFR 2.1%) in 204 infected countries and 151 community transmission countries. As of August 19, 2021, the Government of the Republic of Indonesia has reported 3,930,300 confirmed positive COVID-19 cases and 122,633 deaths (CFR: 3.1%) related to COVID-19 were reported and 3,472,915 patients have recovered from the disease.

The COVID-19 pandemic has affected all sectors of life, especially after the policy social distancing limiting social interactions. This has resulted in the emergence of a work from home petition to minimize the spread of the COVID-19 virus. All sectors that can Work from Home work from home is expected to be able to do so, including the education sector.

Distance learning (PJJ) in accordance with law no. 20 of 2003 Article 1 is education in which students are separated from educators and learning uses various learning resources through communication technology, information and other media. However, the sudden change from conventional learning to learning On line does not give time for students to adjust to learning on line, so that not all students are ready for learning On line.

Learning factsOn linedifferent from conventional learning where conventional learning allows for human psychological contact in the learning process.

Junior high school children are children who have just entered their early teens where that phase has a lot of desires in various characteristics where junior high school children in learning have the ability to think coherently in forming mental images of reality and are able to know themselves better and develop their identity.

Brain Gym is a series of exercises for dynamic, cross-body movements.” Brain Gym movements provide access to body balance. Brain Gym movements are formed according to the parts of the brain so that the brain can function properly, such as crossing body movements to function the left and right hemispheres of the brain [1].

In the implementation of online learning, there are various obstacles from infrastructure, students' understanding of absorbing and remembering learning material. Based on the problems that have been described previously, we are encouraged to provide learning methods that can improve cognitive and memory, namely by Collaborative Class on Virtual Pandemic.

Collaborative classes are a new style in improvising learning methods during a pandemic by combining several classes or coming from different agencies providing improvisation or modification of learning in virtual classes. Collaborative classes are usually carried out in conventional classes between teachers and students in one school or in different classes. At the same time, with the development of virtual technology, collaboration can be done, it is very possible to become a necessity with the availability of supporting devices and adequate internet so that it can collaborate with schools, regions, to national and world boundaries. Update content on variables with health education. A significant influence with the provision of health education using virtual media and demonstration methods on the level of knowledge [2].

Collaboration is actually a human need, where naturally humans as social beings are always in touch with other humans, work together and help each other based on field observations/analysis, in pandemic conditions all academic levels of learning must be able to master some of the ability to control technology previously rarely done during conventional learning so the lessons learned from virtual collaboration classes created something new and unusual, interactions were directed according to the planned program, encouraged competence and positive competitiveness and other advantages. The breadth of the collaboration class dimensions, so the implementation of collaboration classes needs to be carried out carefully, quickly, effectively and provides optimal added value.

The results of previous research found that the effectiveness of a collaborative learning method was at a sufficient / moderate level of 75% While students who considered the effectiveness of a collaborative learning method to be at a high level of 9% for students who considered the effectiveness of a collaborative learning to be at a low level of 16% [3].

The results of research conducted previously showed a decrease in student saturation after the implementation of brain exercise [4]. The results of student saturation before being given brain exercise, the level of student saturation was obtained, most of the respondents experienced moderate saturation (62.0%). After being given brain exercise, the saturation level of students decreased by as much as (57.7%).

Providing information through health education can provide short-term and long-term memory so that someone who does not know becomes aware, especially about the dangers of smoking.

Research Design

The approach method of obtaining data used in the research is the quantitative method. The approach that the researchers took was a quasi- experimental quasi-experiment. The design used "One Group Pretest-Post test Design" sampling technique Random Sampling at the junior high school academic level, data collection uses research instruments, data analysis is statistical. The approach and type of research used in this research is quantitative method. The quantitative approach is a research method based on the philosophy of positivism, used to examine certain populations or samples [5].

Population and Research Sample

The population of students has the ability to carry out learning with the method on line or long distance with an age range of 13-15 years. Understanding of students in using virtual media. Based on the target, the population is located in a different area and it is possible to analyze the geographical differences between SMPN 26 Bandung City and SMPN 40 Bandung City. The total representation of the two schools is 30 respondents.

The sample in this research is students who will be assessed for their ability to understand and remember while in a virtual room by collaborating and getting to know each other and working together. Software G power version 3.1.9.7 by using T-test matched pairs with assumption two tails = 0.05 effect size = 0.7 0.05, then the estimated sample for each group is 30 respondents. The sampling technique is Random Sampling, inclusion criteria: Willing to be a respondent, have the device to conduct virtual classes. Exclusion criteria: junior high school students.

Research Location and Time

The location of this research is carried out in their respective homes using virtual media Zoom Meeting's Meeting's in accordance with the title of the research program, namely collaborating with the academic level of junior high schools. This research adapts to the location of the situation in the field which requires all academic levels to carry out learning.

The time of this research was carried out after receiving confirmation of approval for permission to conduct research from the school and permission from the institution. core research is carried out for two weeks with discontinuity of research variables in the first week and one week for the research core in the second week Instruments and Modules.

Instruments and Modules

Research Instruments: The questionnaire is a form of non-test research instrument used for research with a large number of respondents and the questionnaire can be read well in revealing confidential matters [5]. The questionnaire used by the researcher is a questionnaire there are 15 question items with a Likert scale with 5 choices, namely strongly agree, agree, hesitate, disagree and strongly disagree.

Module

This research module or module measuring unit discusses cigarettes and smoking to find out and observe how much students pay attention to when giving module material. and evaluating the development of student memory. The average age of smokers who started as a teenager will lose 22 years of normal life expectancy, meaning that someone who starts smoking in their teens will die before the age of 70. Teenagers think that smoking is an interesting thing, making it easier to get along with friends and increase concentration. Based on this, the importance of education about smoking and cigarettes (Table 1).

Table 1: Isi Modul Rokok Dan Merokok

Intervention Group

The intervention group received health education about smoking and smoking during week 2. where on the first day the group was given an improvisation of the understanding of smoking and smoking by adjusting the flow to the module using media Zoom Meeting's. on the second day and so on until the 14th day, the provision of material along with questions and answers through virtual media Zoom Meeting'sand Whatsapp Groups.

Data Analysis

Univariate Analysis: Univariate analysis aims to describe the distribution of frequency, mean and percentage of each research variable. Univariate analysis in this research regarding the demographic characteristics of the respondents include, age, class, gender.

Bivariate Analysis

This research uses test paired t-test, this technique is used to test it is said to be meaningful if it has a value p-value <0.05 which means (t there is a significant change) and > 0.05 (there is no significant change after the intervention is given. The overall score of the pretest and posttest scores and see the effect of the intervention using the application IBM SPSS software version 26.0 for windows.

Collaborative Class On Virtual Pandemic is a new style and effectiveness in improvising learning methods during a pandemic. In accordance with the results of the research conducted, it was found that the effectiveness of a collaborative learning method was at a sufficient/moderate level of 75%.

Meanwhile, students who considered the effectiveness of a collaborative learning method to be at a high level of 9% for students who considered the effectiveness of a collaborative learning to be at a low level of 16% [3]. In this research, combining Brain Gym (brain exercise) for eliminate boredom when using virtual media Zoom Meeting's and to increase focus on respondents, according to the research conducted. There was a decrease in student saturation after the implementation of brain exercise. The results of student saturation before being given brain exercise, the level of student saturation was obtained, most of the respondents experienced moderate saturation (62.0%). After being given as much as (57.7%) brain exercise, the saturation level of students decreased [4].

This research data is in the form of scores from the total questionnaire of Students before and after the implementation of the intervention in a virtual collaborative classroom, in the collaborative classroom questionnaire it has indicators such as cognitive and memory. The indicators in the cognitive domain are improvements to Bloom's taxonomy and indicators in good memory, namely being able to name and represent again. The time for the intervention to collect cognitive data was 30 minutes for the first 30 minutes of school-age children divided into several learning sessions. in group research with various sessions lasting an average of 15 minutes and updating tasks lasting about 20-25 minutes. The two sessions are not consecutive; this is to avoid the possible effects of fatigue [6]. lecture What researchers do in collaborative classrooms to test memory is to give different intensity of time and day after giving the intervention lecture health education triggers cognitive to fulfill memory indicators for one week so as to obtain data, both before and after data collection, data analysis and data processing.

Based on the Table 2, it can be seen that the average age of the respondents is 13.90±0.66, the majority of respondents are in grade 9 with a total of 21 people (70%), most respondents are female with a total of 21 people (70%), Characteristics of age range WHO age limit (World Health Organization) is 12 to 24 years of typical adolescent behavior documented throughout history. During adolescence, time spent with friends usually increases, compared to childhood and adolescents' evaluations of their social and personal values are more dependent on their peers, this causes adolescents to easily experience stress due to a strong desire to attract attention for existence. or recognition from friends. Stress in adolescents is also related to teaching and learning relationships, related to desire and control, related to group activities and related to social relationships.

The environment affects memory/literature references according to research by Elisa Haryani in 2021. A comfortable or conducive environment in the broad sense of the environment includes climate and geography, place of residence, customs, knowledge, education and nature. The learning atmosphere can be fun for students if the teacher can present and use humor appropriately. If learning is comfortable and conducive, the material presented by the teacher can be easily accepted by students and students will be more interested in the material presented by the teacher.

Table 2: Demografi Karakteristik Responden

Based on the Table 3, shows that there are significant changes in cognitive variables as evidenced by the value of p-value of 0.000 <α (0.05) the average score before 26.26±2.69 after being given the intervention increased to 31.60±3.53 the results of cognitive analysis obtained an increase in score of 5.34 then the collaboration class intervention could affect cognitive. The results of the analysis on the memory variable obtained a decrease in the score of 0.24 there was no significant change with the proven value of p-value of 0.482 >α (0.05), the average power score Remember that before the intervention was given, it was 25.70±2.43 and after being given the intervention it became 25.46±3.19 so it was concluded that the alleged influence of memory was caused by several factors such as age and an environment that was not conducive outside the researcher's intervention.

Table 3: Hasil Capaian Kelas Kolaborasi Perbedaan Skor Kognitif Dan Daya Ingat Setelah Diberikan Intervensi

Cognitive Changes Before and After Collaborative Class on Virtual Improvisation Learning Methods

Based on the research results, there is a difference in score with p-value of 0.000 (<0.05) the average score before being given the intervention was 26.26±2.69 and after being given the intervention it became 31.60±3.53 the results of cognitive analysis obtained an increase in the score of 5.34. So it can be concluded that Collaborative Class On Virtual improvised learning methods can affect the cognitive of students at SMPN 26 and SMPN 40 Bandung.

Health education content and Brain Gym the characteristics of the content are adjusted to the age range WHO age limit (World Health Organization) is 12 to 24 years. The unique characteristics of each junior high school teenager aged 13-15 years in Indonesia have a distinctive behavior that is inconsistent with decisions, time spent with friends, interdependent behavior on friends and teenagers can experience stress due to learning by delivery. which is not correct.

Stress during online learning for teenagers generally has the characteristics of being easily bored, not interested in one lesson, or in group activities far from their closest friends. The characteristic desire of adolescents to understand has an increasing power and attracts attention so that it can be recognized and received recognition from their friends, this makes positive energy to be carried out continuously with ambition and enthusiasm.

At the age of adolescence, individuals are able to think critically analytically, where they are able to make plans for the future. Teenagers determine the action to be taken, they start by thinking about it, feeling it, about the consequences and responsibility for the actions chosen for themselves and the environment. So that the environment is also stated to be one aspect of its decision making.

Perubahan Daya Ingat Sebelum Dan Sesudah Dilakukan Collaborative Class on Virtual Improvisasi Metode Belajar

Based on the results of the research, there is no difference in score with p-value of 0.482 the average memory score before being given the intervention was 25.70±2.43 and after being given the intervention it became 25.46 ± 3.19 getting a decrease in score of 0.24. So it can be concluded that Collaborative Class virtual improvisation of learning methods did not show any change in the memory of the students of SMPN 26 and SMPN 40 Bandung.

The effect of the difference in scores resulted in a decrease in memory caused by several factors such as age and an unfavorable environment outside of the researcher's intervention as well as habitual patterns of learning methods that require new adaptations and the time needed to remember. Good memory skills are short and long periods of time so that you can repeat and recall interventions based on a well-accepted understanding without any distractions that can break the focus of memory, this needs to be managed systematically or separately according to the ability of each individual to receive competence. targeted to achieve fast and precise memory results.

Due to the lack of relationship between teachers and students so that it can slow down the teaching and learning process, online learning that utilizes the internet is pushing towards the business aspect rather than the academic aspect, the learning system that leads to practice rather than theory, the teacher's duties have changed from those originally using conventional educational methods. currently required to understand internet-based educational methods and technology, student failure in learning can occur if students lack high motivation and not all places can access the internet.

A relevant assumption for future research researchers is that it is hoped that by creating a longer memory intervention and time continuity time series with the concept of consistently varied learning and collaboration so that memory can be tested with interventions that adjust to the respondent's long-term and short-term memory abilities to be tested both in terms of usefulness and uniqueness of relevant content that will be given to be able to understand and repeat understanding of the material both before and after the intervention and the development of variables.

• Overview of the spread of COVID-19 in Indonesia as of August 19, 2021, the total confirmed cases of COVID-19 in the world are 209,201,939 cases with 4,390,467 kdeath has an impact on the education sector sudden change from conventional learning to learning On line does not give time for students to adjust to learning On line, so that not all students are ready for learning On line

• Collaborative Class On Virtual Pandemic is a new style and effectiveness in improvising learning methods during a pandemic, this research is carried out at home using virtual media Zoom Meeting'sadjusting the research program by collaborating with the academic level of junior high school as the object of research. The researcher found that the effectiveness of a collaborative learning method was on the effectiveness of one variable, namely improving cognitive while students who considered the effectiveness of the memory variable of a collaborative learning method to be in low influence.

• In the intervention group, there was a significant effect of collaborative class between differences in cognitive scores and memory before and after the intervention was carried out on 30 respondents with a score of p-value cognitive = (0.000) <α (0.05) then this is that the results before and after the intervention there is an increase in score and an effect on cognitive with collaborative classroom intervention

• In the intervention group, memory was influenced by the value of p-value = 0.482>α (0.05) the difference in memory scores before and after the intervention had an insignificant effect, it stated that the basis of the memory intervention carried out was influenced by allegations of several factors while in the virtual room, both age and an environment that was not conducive so that there were factors factors beyond the expectations of researchers in focusing the memory of students

• The questionnaire is a form of non-test research instrument used for research with a large number of respondents and the questionnaire can be read well in revealing confidential matters. The questionnaire used by the researcher is a questionnaire with a Likert scale. The Likert scale is used to measure attitudes, opinions and perceptions of individuals who are objects or research subjects about an observed phenomenon

• The module on the theme of health education is the concept of cigarettes and smoking to find out and observe how much students pay attention to when giving material. Univariate analysis in this research is about demographic characteristics of respondents including, age, class, gender

Acknowledgment

Alhamdulillah, thanks to Allah SWT because of His will and blessing the team was able to complete this scientific article with the PKM-Humaniroa Social Research scheme well. The team realizes that this article would not be finished without prayers, support and encouragement from various parties. The PKM-RSH (Social Humanities Research) team came from the PPNI West Java School of Nursing with the title Collaborative Class On Virtual Pandemic say a big thank you to:

• Our team's accompanying lecturer Dian Anggraini, S. Kep. M. Kep who has accompanied us and provided access to monitoring and evaluation assistance to motivation in carrying out our research from the initial stage to this stage.

• Our institution is STIK ep PPNI West Java with various management facilities, support and institutional trust in the team carrying out research programs and as an estuary to develop the potential and abilities of students in experience and achieve the best and professional results

• The schools of SMPN 26 Bandung City and SMPN 40 Bandung City who have helped coordinate to accept our program and respondents in research Collaborative Class On Virtual Pandemic Learning Methods of Cognitive Improvisation and Memory

1. Morgani, L. et al. “Efektivitas Penerapan Brain Gym untuk Meningkatkan Minat Belajar.” Jurnal Pendidikan dan Pembelajaran Khatulistiwa, vol. 9, no. 3, 2020, pp. 1–3.

2. Aeni, N. and D.S. Yuhandini. “Pengaruh Pendidikan Kesehatan dengan Media Video dan Metode Demonstrasi terhadap Pengetahuan SADARI.” Jurnal Care, vol. 6, no. 2, 2018, p. 170.

3. Shobah, N. “Pengaruh Metode Pembelajaran Kolaboratif dalam Meningkatkan Motivasi Belajar Siswa Kelas XII IPA di SMA Excellent Al-Yasini, Pasuruan.” Doctoral Dissertation, Universitas Islam Negeri Maulana Malik Ibrahim, 2018.

4. Sutopo. “Pengaruh Senam Otak (Brain Gym) terhadap Tingkat Kejenuhan Siswa di SMPN Jombang Kelas VIII.” Sekolah Tinggi Ilmu Kesehatan ICME Jombang, 2018, pp. 5–6.

5. Sugiyono. Metode Riset Kuantitatif, Kualitatif, dan R&D. Bandung: Alfabeta, 2017.

6. Artuso, C. and P. Palladino. “Long-Term Memory Effects on Working Memory Updating Development.” PLOS ONE, vol. 14, no. 5, 2019, pp. 3–5.