The background of this research is to find information on learning models that can improve the thinking skills of elementary school students in science learning. The purpose of this study was to determine the effectiveness of the problem-based learning model to enhance the critical thinking skills of elementary school students in science learning. This study was a true experimental design with a type of post-test group. The results showed that the problem-based learning model could improve the critical thinking skills of elementary school students in science learning. This study implies that elementary school teachers can use a problem-based learning model in enhancing students’ critical thinking skills in science learning in elementary schools.

Local cultural wisdom needs to be maintained because it indicates the characteristics of a region, including the social field. The social culture of each region is very unique and different. The uniqueness of social culture in each region always adheres to positive teachings and deserves to be preserved. The purpose of this research is to produce an ethnosocial learning model that is suitable for use in the learning process. The research was conducted with an R&D approach. The research subjects were students, teachers, and principals of elementary schools. The instrument used is a questionnaire. The results showed that elementary school ethnosocial involvement in the social science learning process was shallow. In fact, what often happens is to provide examples of socio-culture in other areas of learning in elementary schools. This incident occurred without any intentional element and was in accordance with what was thought when the social science learning process took place. For this reason, it is necessary to create an ethnosocial learning model so that there is an effort to pay attention to ethnosocial in their own environment. One of the efforts that can be done is to develop an ethnosocial learning model in elementary schools. The ethnosocial learning model that was created was declared feasible to be applied in elementary schools. The advantage of the ethnosocial learning model is that this model pays attention to the social development of children which is adapted to the local culture.

Penelitian ini bertujuan untuk mendeskripsikan peningkatan hasil belajar peserta didik pada pembelajaran tematik terpadu menggunakan pendekatan seintifik di kelas III SD Negeri 24 Parupuk Tabing Padang Barat. Jenis penelitian ini adalah Penelitian Tindakan Kelas (PTK) dengan pendekatan kualitatif dan kuantitaif. Subjek penelitian adalah guru dan peserta didik kelas III SD Negeri 24 Parupuk Tabing Padang Barat yang berjumlah 26 orang diantaranya 15 orang peserta didik laki-laki  dan 11 orang peserta didik perempuan. Dari hasil penelitian menunjukkan bahwa. perencanaan pembelajaran siklus I diperoleh rata-rata  81,94% (B) dan pada siklus II meningkat 91,66% (SB). pelaksanaan pembelajaran pada aspek guru siklus I diperoleh rata-rata 83,93% (B) dan meningkat pada siklus II 92,85% (SB), serta pada aspek peserta didik siklus I diperoleh rata-rata 82,14% (B) dan meningkat pada siklus II 96,42% (SB). Pada hasil belajar peserta didik diperoleh rata-rata siklus I yaitu 73,8 (C) dan meningkat pada siklus II 86,60% (SB).