This study aims to produce EdPuzzle content in polymer materials and examine its effectiveness on students’ problem-solving skills. The method used in this research is experimental research, employing a pre-test post-test one-group design through online learning. The subject of this study is 70 tenth grade students. Data were collected using students’ problem-solving skills tests and analysis of the learning process to determine the effectiveness of online learning. The data obtained were then analyzed using quantitative descriptive. The results showed that learning using EdPuzzle is statistically very significant in improving students’ problem-solving skills and is quite effective in online learning. The study concludes that EdPuzzle is quite effective to improve students’ problem-solving skills which are characterized by an increase in the score of pre-test to post-test, with an N-gain of 63%. The implementation of online learning EdPuzzle is quite effective with an effectiveness score reaching 91%.

In the 1980s, efforts to integrate regions across Indonesia, especially South Sumatra, led to the elimination of customary law and customary government. Before the introduction of the Undang-Undang Desa (Village Government Law), South Sumatra’s customary government had adopted a customary government system known as the Marga system. This study employs a spatial methodology, combining historical maps and satellite pictures as data sources, to examine the level of deforestation in the Komering watershed from before the Marga government was dissolved till after it was abolished. In addition, the purpose of this study is to determine the function of customary law in preserving environmental sustainability in the Komering watershed. The results of processing the topographic map from 1910 were then compared to the results of processing the Sentinel-2 satellite image to see how the level of the land had changed over a century. The annual average rate of deforestation is around 274,944 ha per year. That is, there have been significant changes in land usage for 109 years. Part of the forest is converted into fields and plantations, while the majority of the swamps and marshes are converted into rice fields. The impetus for this transformation began in 1983, when the Marga government system was abolished. Long in charge of South Sumatra, the Marga Government System has already established regulations for conserving its natural resources. The system is a successful method for managing watersheds because of its pattern of limited land cover on slopes and along rivers. The inhabitants of South Sumatra are ruled by a system of Marga, and their daily lives are guided by the customary law. The Simbur Cahaya Customary Law controls sociopolitical connections between communities. The management of these relationships appears to be an effort to safeguard shared resources, such as forest timber plants and riverbank land. Consequently, customary law plays a vital role in protecting the environment, especially forest land and njurung land (mid-channel bar).

Marga's is a government system that has existed in South Sumatra society in the past. The socio-cultural wealth of the people of South Sumatra has become a special attraction for historical studies, social sciences and development policies. The occurrence of social deviations such as the emergence of the gerandong symptom along Komering Street is a sign that development policies so far have had an invisible negative effect as a result of socio-cultural and political development policies that ignore the historical roots of local communities. The purpose of this paper is to attempt to investigate the history of marga's in overcoming social problems, with a social science approach framework to find a socio-cultural policy model based on community knowledge in the East OKU region, South Sumatra. The method used is to use historical methods and qualitative methods of social science. Based on the results of the study, it can be seen that in the past the marga's community was able to have a better social life. This social integration is maintained in the form of rules of life and marga's government with higher social sanctions than legal sanctions. The development carried out by marga's in East OKU has inserted a lot of ownership rights to the members of the marga's, so that the sense of guarding and inheritance is stronger. Reproduction must be carried out in the form of a variety of socio-physical development as it can be a practical contribution for the current political authorities in making public policy.