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This research aims to determine the implementation of the Missouri Mathematics Project (MMP) learning model and the influence of the Missouri Mathematics Project (MMP) learning model on the concept understanding ability of class II MI Miftahul Huda students in the 2024/2025 academic year. The method used in this research is an experimental method with a quasi-experimental type. The design in this research is a nonequivalent control group design. This research design involved two classes, the experimental class, namely class II A using the missouri mathematics project learning model and control class II C using the conventional learning model. Data collection techniques use the results of concept understanding tests. Based on the results of research on the Independent Sample T-test which shows that the significance (2-tailed) is 0.000 < 0.05, which means less than 0.05, so H0 is rejected and Ha is accepted, which means there is an influence of the missouri mathematics project learning model on understanding ability. MI Miftahul Huda class II flat shape concept.    

This research aims to determine the implementation of the Missouri Mathematics Project (MMP) learning model and the influence of the Missouri Mathematics Project (MMP) learning model on the concept understanding ability of class II MI Miftahul Huda students in the 2024/2025 academic year. The method used in this research is an experimental method with a quasi-experimental type. The design in this research is a nonequivalent control group design. This research design involved two classes, the experimental class, namely class II A using the missouri mathematics project learning model and control class II C using the conventional learning model. Data collection techniques use the results of concept understanding tests. Based on the results of research on the Independent Sample T-test which shows that the significance (2-tailed) is 0.000 < 0.05, which means less than 0.05, so H0 is rejected and Ha is accepted, which means there is an influence of the missouri mathematics project learning model on understanding ability. MI Miftahul Huda class II flat shape concept.    

This research was carried out with the aim of improving students' leadership skills through the Learning Together model with material on the perimeter and area of flat figures for class IV. This research uses classroom action research carried out at SD Negeri 1 Pohkumbang. The subjects of this research were all 20 grade IV students at SD Negeri 1 Pohkumbang. The instruments used are observation, interviews, tests and documentation. Data analysis techniques are carried out using qualitative methods in the form of descriptive and quantitative methods of presenting data and drawing conclusions. The results of the research show that the skills in implementing the Learning Together model can improve students' leadership skills with the percentage results for cycle I 35% and cycle II 85% which are categorized as good.    

A flat shape is a geometric part that only has a perimeter and area. There are various shapes of flat shapes, such as triangle, square, long, parallelogram, rhombus, kite, trapezoid, and circle. The aim of this research is to conduct a literary analysis related to the difficulties faced by students in expressing their ideas in the subject. which are given. The analysis method used is called Systematic Literature Review (SLR). Data collection was carried out by documenting and reviewing 7 national index articles; the articles are then broken down into different areas. Based on the research results, there are thirteen articles that discuss the difficulties experienced by students when solving problems related to the topic of building a flat-sided room. Based on the research results, it can be concluded that there are still problems that students often face when trying to solve problems related to the construction of flat-sided spaces. The most common types of errors are formula errors, errors in shape identification, and errors in understanding the concept of plane figures. This is caused by uneven understanding of concepts, inaccurate determination of formulations, and uneven student bias in understanding the results of flat shapes.

Mathematics is a field of study that has an important role in education. Geometry is one of the mathematics materials taught in primary and secondary schools. However, students in PGMI 3 class still experience many misconceptions in understanding plane material by applying polya theory. The aim of this research is to identify and analyze common misconceptions related to plane material by applying polya theory. This research uses a qualitative method with a descriptive approach. The subjects of this research were 18 out of 39 PGMI 3 UIN North Sumatra students. The results of the research show that there are several misconceptions that occur which involve basic understanding of plane material, steps in solving problems with plane material, misunderstandings about what polya theory is like and making mistakes by not putting symbols in solving problems. This research aims to provide important insights into curriculum development and a more effective teaching approach in working on plane material by applying polya theory. With a more effective understanding of the misconceptions that arise in plane shape material by applying polya theory, appropriate action can be taken to overcome this problem and can help PGMI 3 students at UIN North Sumatra to develop an understanding of plane shape material by applying polya theory better.