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This study analyzes junior high school students' errors in solving mathematics problems involving integers. This study was conducted through a systematic literature review of 12 related research articles published between 2021 and 2026. The analysis shows that students' errors in integers include contextual, procedural, and technical (calculation) errors. The most common conceptualization errors were found in the understanding of positive and negative signs and the rules for mixed operations. The main causes of errors are a lack of in-depth conceptual understanding, the habit of memorizing without understanding, and a lack of practice using concrete media. Internal factors such as learning motivation and external factors such as learning methods and media also contribute. This study recommends that the mathematics learning process emphasize meaningful conceptual understanding, the use of concrete media, and learning strategies that engage students' mathematical connection skills. Thus, difficulties in learning integers can be minimized sustainably.

This research aims to analyze the implementation of land acquisition policies in Sorong City from the perspective of social justice for indigenous peoples, and to evaluate the extent to which customary rights are accommodated in the development process. The research method is a mixed-methods study with an embedded design. The qualitative approach was the primary instrument, using in-depth interviews with five key speakers, including land authorities and representatives of the Malaloi Indigenous Peoples Institution (LMA). Quantitative approaches are used only in correlation analysis to reinforce qualitative findings. The study's results show a "Paradox of Justice" in Sorong City. Procedurally, the land acquisition policy has been effective in accordance with Law Number 2 of 2012, supported by a strong statistical correlation between land acquisition and social justice. However, substantively, justice for indigenous peoples has not been fully achieved because the involvement of indigenous leaders in deliberations is often considered a mere administrative formality. The highest correlation between indigenous peoples and social justice confirms that the recognition of customary rights is the main determinant of justice in public policy. The main obstacles identified include difficulties in the administrative documentation of customary lands and paradigmatic differences between the government's materialistic values and the sociocultural values of indigenous peoples. The theoretical implications of this study confirm the importance of communication factors and the disposition of implementers in the implementation of policies in customary territories. In practice, the government needs to reformulate deliberations based on local values and the structural recognition of customary rights.

Human trafficking constitutes a transnational crime that inflicts physical, psychological, and economic suffering upon its victims. This research aims to analyze the fulfillment of restitution rights for victims of human trafficking and examine preventive efforts from the immigration perspective. According to Law Number 21 of 2007 concerning the Eradication of Human Trafficking, every victim has the right to restitution as compensation for losses suffered. However, implementation in practice still encounters numerous obstacles, including weak law enforcement, limited understanding among law enforcement officers, and insufficient technical regulations. This normative legal research employs statutory and conceptual approaches to examine primary legal materials, including Law Number 21 of 2007, Law Number 6 of 2011 on Immigration, and various implementing regulations. The findings indicate that legal protection for victims of human trafficking has not been optimal, with challenges including difficulties in proving immaterial losses, dual procedural systems between the Human Trafficking Law and Criminal Procedure Code, and weak coordination among law enforcement agencies. The Witness and Victim Protection Agency (LPSK) often cannot guarantee restitution payments as determined by judges. From the immigration perspective, the Directorate General of Immigration plays a strategic role in preventing human trafficking through travel document control, implementation of the Integrated Border Control Management (IBCM) system, education for prospective migrant workers, and cross-sectoral collaboration. However, challenges persist, including complex and evolving modus operandi, limited resources in remote border areas, and inter-agency coordination obstacles. The study concludes that synergy between institutions and improvements in education and regulation are required to ensure victims' restitution rights are fulfilled effectively.