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This study analyzed Higher-Order Thinking Skills of Environmental Problem (HOTSEP). It was conducted in March 2021. The sample comprised 114 vocational high school students, 66 male and 49 female students from several schools in Jakarta, Indonesia. The data was collected online using Google Form and Microsoft Excel for data analysis. The results showed that the HOTS score with analyzing environmental problems (C4) obtained an average score of 50. The thinking aspect of evaluating environmental problems (C5) obtained an average score of 49. The thinking aspect of making programs to overcome environmental problems (C6) obtained an average score of 47. Therefore, the study showed that the HOTS scores were relatively low since the average score was 51. The results showed that the HOTSEP score on the criticizing environmental problems (C4) obtained an average score of 24. The thinking aspect of environmental problem solving (C5) obtained an average score of 25. Furthermore, the thinking aspect of environmental innovation development (C6) obtained an average score of 23. Therefore, the study showed that the HOTSEP score was poor since the average score was 26. The research results suggest that learning media employed requires an improvement related to disaster mitigation. One media that can be developed is Disaster Research integrated book for Vocational Education (Drica). It can be concluded that the research results generally indicate that the vocational education students remain lacking in the HOTSEP aspect.

Flooding that occurred recently has become a very detrimental disaster for the victims. This flood disaster is still a concern for people in Indonesia. Flood mitigation needs to be done to all levels of society, especially vocational school students. Vocational school students must be responsive in any situation because, after graduation, they are ready to work. Disaster mitigation is essential to be included in learning at school. Disaster mitigation is also related to the Higher-Order Thinking Skills (HOTS) to always be ready and alert. In measuring vocational school students' understanding of disaster mitigation, initial research was carried out related to disaster mitigation and HOTS. The research subjects were 100 students of Vocational School in Jakarta who were randomly selected. This study used Google Forms as a data collection technique. The results showed that the students’ HOTS score was still low. The results showed that the Students’ HOTS scores on flooding were still low. The average score obtained by the whole students was 43.34. The male students obtained 30.27, and the female students obtained 45.97. All schools in Indonesia should implement early mitigation education that is integrated with HOTS learning.

COVID-19 harms the implementation of learning at various levels, including at Islamic universities. Students at Islamic universities must use e-learning for several months until the COVID-19 outbreak ends. Students are also required to have Higher-Order Thinking Skills (HOTS) to solve problems. They are also required to have Pro-Environmental Behavior (PEB) related to COVID-19. Previous research has developed a Higher-Order Thinking Skills Assessment based on Environmental Problem (HOTS-AEP). The purpose of this research was to describe an implementation of e-learning, HOTS, and PEB on students during the COVID-19 outbreak. The method used was descriptive through the survey technique. This research was conducted in March 2020. The instruments used were questionnaires on e-learning and HOTS-AEP related to COVID-19 (HOTS-AEP-COVID-19). Meanwhile, to measure PEB, PEB-COVID-19 was used. All instruments were constructed using Google Form and were distributed to 137 respondents via social media. The results showed that the implementation of e-learning was generally effective (27.74%) and quite effective (43.07%) even though some problems were encountered. Other results showed that students’ HOTS were in the poor category (26.20) while the PEB was in the excellent category (84.82). it can be concluded that e-learning during the COVID-19 outbreak has gone well although some innovations are needed. Besides that, HOTS needs to be improved while PEB needs to be maintained.

Learning in the 21st-century, students are required to have a good understanding of the latest environmental issues, namely the ability of Higher-Order Thinking Skills (HOTS). Environmental learning at the Junior High School level in public school and Islamic-based schools requires deepening of the material by the latest environmental issues such as green consumerism. The purpose of this study was to develop an Android-based Supplementary Book of Green Consumerism (SBGC) for environmental learning in natural science subjects. The research method used in this study was the research and development of Borg and Gall development with a few modifications. This study was only carried out up to the validation stage by experts. The results showed that the SBGC was highly valid with a validation score of 3.70 and the percentage of completeness of 92.50 %. Based on the scores obtained, it can be concluded that SBGC is suitable to be used in environmental learning. SBGC has the advantage of being based on technology, based on HOTS, as well as simple and attractive. It can be concluded that SBGC can be used in environmental learning at schools.

The damage to nature and the changing situation of the surrounding environment certainly make you anxious. The role of students in safeguarding nature is certainly one of the important points in determining the sustainability of green consumerism. The purpose of this study is to see the influence of gender in the students' Pro-Environmental Behavior (PEB) in understanding the concept of green consumerism. The research was conducted in July-August 2018. The research was located at State Junior High School (SMPN) 1 of South Tambun, Bekasi, West Java, Indonesia. The method used was a survey with simple random sampling to obtain 214 samples consisted of 107 male students and 107 female students. PEB score of male students was 63.86 and 64.34 for female students. Data analysis used was t-test with a confidence level of 95%. The results of the t-test showed that there were no differences in green consumerism in terms Pro-Environmental Behavior between male and female. This shows that there needs to be an effort in evaluation by the teachers to improve the male and female students Pro-Environmental Behavior.