The covid-19 pandemic in Indonesia has affected various sectors, one of them is in the education sector. Thus, it interferes with the learning processes conventionally. A solution is needed to respond to the problem in the 21st century. Online learning is one of the alternative ways in utilizing the use of IT-based teaching materials. This study aims to improve the students’ critical thinking skills by using an e-module. The research was the quantitative descriptive method. This study was a quasi-experimental by using a nonequivalent control group design. The samples of the study consisted of 2 classes, namely XI MIPA 1 and XI MIPA 2. The analysis results using independent sample t-test showed a significance value of 0,000 0,05. The data analysis results of critical thinking skills used N-gain score test; the experimental class obtained a score of 0,72, in which it belonged to the high category. Meanwhile, the average N-gain score for the control class was 0,34, in which it belonged to the medium category. It can be concluded that there is a significant difference in the students’ critical thinking skills between the experimental class and the control class. Therefore, the implementation of a phenomenon-based learning e-module can be an alternative to improve the students’ critical thinking skills.

Bacteria in sediment plays an important role in various biochemical processes in the waters area, for instance degradation of organic matter, biogeochemical cycle, controlling ammonium, nitrates and nitrites concentration, food source for fauna, primary production, and pollution remediation. The purpose of this study was to determine the diversity of bacteria (Genus) in sediment on the Mangrove and Bekantan Conservation Area (KKMB), Tarakan City. The method used was explorative descriptive method with genus identification as parametric test. Bacterial identification parameters were tested using Gram-test, main test and further test was carried out at the Laboratory of Fish Quarantine, Quality Control and Safety Fishery Products Class II Tarakan. The bacteria found in the sediments on the KKMB were 16 genera i.e. Enterobacteria, Eubacterium, Listeria, Actinobacillus, Bacteriodes, Streptococcus, Plesiomonas, Corynebacterium, Pseudomonas, Aeromonas, Bordetella parapertussis, Micrococcus, Staphylococcus, Clostridium, Neisseria, and the dominant numbers found was Bacillus.

The human need for recreation from the saturation of urban activities is very supportive of the development of the tourism sector, especially natural tourism which brings natural beauty. But until now there are still a few tourist attractions that are able to accommodate and facilitate vacation activities for tourists, as well as a lack of human awareness of the environment. The emergence of a problem can be helped with programming methods as a problem-solving. To produce a natural tourism sector that is environmentally friendly and can accommodate all vacation activities according to predetermined standards. The results of the resort building design use a sustainable concept where the building is designed so as not to damage the surrounding environment and save energy.

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Penelitian ini bertujuan untuk mengetahui pengaruh media audio visual terhadap hasil belajar kriya keramik di SMK Negeri 8 Padang. Hipotesis yang diuji dalam penelitaian ini adalah hasil belajar kriya keramik yang diajar dengan menggunakan media audio visual berbeda secara signifikan dengan hasil belajar kriya keramik yang diajar dengan menggunakan media konvensional. Populasi dalam penelitian ini adalah seluruh siswa kriya keramik. Sampel pada penelitian ini adalah siswa kelas XI kriya keramik. Teknik pengambilan sampelnya adalah purposive sampling. Jenis penelitian yang digunakan adalah eksperimen semu (Quasi-experimen) dengan rancangan penelitian Pretest-Posttest Control Group Design. Data penelitian dikumpulkan dengan tes hasil belajar. Data kemudian dianalisis dengan Uji-t. Temuan penelitian menunjukkan bahwa: hasil belajar kriya keramik yang diajarkan dengan menggunakan media audio visual berbeda dengan hasil belajar kriya keramik yang diajar dengan menggunakan media konvensional. Berdasarkan temuan penelitian di atas, dapat disimpulkan bahwa media audio visual berpengaruh positif terhadap hasil belajar siswa dalam mata pelajaran kriya keramik. Oleh karena itu media audio visual sangat baik untuk digunakan secara terus menerus oleh guru dalam proses pembelajaran guna untuk meningkatkan hasil belajar siswa khususnya pada mata pelajaran kriya keramik di SMK Negeri 8 Padang. This research aims to understand the influence of audio visual media to the result of learning pottery crafting in SMK Negeri 8 Padang. This research tested the hypothesis to know is there a significant difference in the result of learning pottery crafting taught by using audio visual media and conventional media. The population is all of the pottery crafting students. The sample is the students of class XI pottery crafting. The technique of sampling is purposive sampling. The type of research is quasi experiment with research plan is Pretest-Posttest Control Group Design. The data is collected by testing the learning result. Then, data will be analyzed by using Uji-t. The result shows : the learning result of pottery crafting that has been taught using audio visual media is difference with the result of learning by using conventional media. Based on the result of the research, we can conclude that audio visual media has positive influence towards students’s learning result in pottery crafting subject. Therefore, the audio visual media is really good to use continuosly by the teacher in the learning process in order to improve the students’s learning result specifically in pottery crafting subject in SMK Negeri 8 padang.