This study aims to develop learning tools in the form of lesson plans and worksheets based on Problem Based Learning mathematics on comparative material for seventh grade junior high school students oriented to the ability to understand concepts. The quality of the developed products is assessed based on aspects of validity, practicality, and effectiveness. The learning device development procedure refers to the 4-D development model, namely Define, Design, Develop, and Disseminate. Due to the limitations of the researcher, the research was carried out until the develop stage. The subjects of this study were students of class VII ASMP Negeri 2 Dolok Pardamean, totaling 34 people. The results of the research, namely: 1) the resulting learning tools, in the form of: lesson plans, student activity sheets and concept understanding tests have met the criteria; 2) the effectiveness of learning tools is concluded based on the percentage of students who understand the concept of at least moderate is 85.29% of the 34 students who take the test and the achievement of the ideal percentage of time for each category of student and teacher activity. In conclusion, the development of learning tools in the form of lesson plans and worksheets based on Problem Based Learning on comparative materials for grade VII junior high school students proved to be effective and able to improve students' conceptual understanding. Keywords: Ability to understand concepts, Learning tools, Problem Based Learning
Penelitian ini dilatarbelakangi dari hasil pengamatan peneliti terhadap materi geometri berkaitan dengan Omo Hada. Sehingga media Omo Hada ini dapat digunakan dalam pembelajaran matematika. Tujuan penelitian: (1) mendeskripsi konsep matematika yang terdapat dalam warisan omo hada Masyarakat Nias khususnya di Nias Selatan, (2) menyajikan hasil kepraktisan media pembelajaran Omo Hada pada materi geometri di Sekolah Menengah Pertama, dan (3) menyajikan hasil keefektifan media pembelajaran Omo Hada di SMP pada materi geometri di Sekolah Menengah Pertama. Instrumen penelitian yang digunakan adalah 1) Angket validasi ahli, 2) Angket respon siswa dan guru mata pelajaran, 3) Tes Hasil Belajar dan 4) Dokumentasi. Berdasarkan hasil penelitian diperoleh: 1) Konsep matematika yang ada dalam pengembangan media geometri dari Omo Hada Nias Selatan adalah materi bangun ruang balok dan prisma segitiga, 2) Hasil keparaktisan media pembelajaran geometri dari Omo Hada Nias Selatan adalah 96,40% dengan kriteria sangat praktis, 3) Hasil pengujian keefektifan media pembelajaran geometri dari Omo Hada Nias Selatan dengan rata-rata 80,03 dan simpangan baku sebesar 8,38.
Psychosocial is commonly defined as referring to a relationship that is close in both psychological and social factors. Emotional and cognitive development, as well as social factors such as interpersonal relationships and the community in which a person lives all influence a person's psychological well-being. Psychosocial is focused on the interpersonal aspects that exist alongside psychological aspects (thoughts, emotions, and behavior) (social relations, traditions and culture). Initiated psychological encouragement (commonly referred to as DPA) is also known as PFA (PFA). Psychosocial encouragement is a type of DPA. DPA aims to reduce the detrimental effects of stress, to help individuals recover from disasters, and to assist in the process of their return to normal. A crisis situation is an ongoing (or expected) event that places people, groups, communities, or societies in an unstable and dangerous position, which then impacts those people, groups, or societies. There are both positive and negative impacts that teachers, students, and also parents have to face and deal with during a COVID-19 pandemic. Stress and pressure can arise naturally, for everyone, when someone is in an unpleasant/crisis situation. Emotional expressions, such as crying in children aged 0-3 years, or other non-adaptive behavior, such as aggressive or tantrums, are common indicators of stress in students (venting anger or excessive emotional outbursts at a certain age because there are unfulfilled wants or needs).
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