Background: Breast cancer is one of the causes of female mortality. The standard treatment for breast cancer is chemotherapy, which unfortunately has some side effects such as physical discomforts. This often causes breast cancer patients to suffer from sleep disorders or sleep difficulties. Sleep disorders may stem from internal or external factors and it affects patients’ sleep quality. If sleep disorders occur in a long time, it will affect the overall quality of life of the patient. Aim: This study aims to summarize various research results that focus on factors affecting sleep quality of breast cancer patients treated with chemotherapy. Materials and Methods: The present study employs a literature review method, using JBI critical appraisal tools to review the selected articles. Searching strategy: To find relevant literature to be reviewed, journal databases such as Science Direct, Google Scholar and PubMed were used. The journal articles were searched using a prism flowchart guideline. Results: There are internal and external factors that affect sleep quality. Internal factors include pain when cancer invades, psychosocial disorder (depression, anxiety and stress), cancer stages and fatigue. Meanwhile, external factors that affect sleep quality include the medication process, both the chemotherapy and the prescribed drugs. Conclusion: Sleep quality of breast cancer patients treated with chemotherapy is affected by internal and external factors. This literature review study is expected to help breast cancer patients to improve their sleep quality by paying attention to these factors.

Background: Collaborative Class on Virtual Pandemic Collaborative class is a new style in improvising learning methods during a pandemic, combined with health education content and Brain Gym. The content focuses on cognitive and memory and by combining several classes or coming from different classes provides improvisation as a modification of learning in a virtual classroom. Collaborative classes are usually carried out in conventional classes of teachers and students in the same school or in the same class, with adjustments to the COVID-19 pandemic situation in West Java, Indonesia and the development of virtual technology that is increasingly advanced and collaboration is developing into a necessity to be done online. Objectives: The research objective to be achieved from the implementation of this activity program is to create c ollaborative classes that have strategies and provide beneficial effects to improve the cognitive and memory of junior high school age children. Materials and Methods: The approach to obtaining data used in research is the quantitative method. The approach that the researchers took was a quasi-experimental quasi-experiment. The design used "One Group Pretest-Posttest Design" sampling technique Random Sampling at the academic level of junior high school, data collection using research instruments, statistical data analysis. Results: This research shows that before and after the intervention there is a decrease in memory as a result of the class collaborative learning method using virtual media which has no significant effect. Comparison with cognitive influence both before and after which has a significant effect with p-value = 0.000 < (0.05). With the collaborative classroom method integrating the world of nursing, it can play an important role in creating a healthy and beneficial increase in learning.