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This research is based on the background of the problems found in grade IX of SMP N 1 Gunuang Omeh District that the low motivation of students in learning mathematics, this is characterized by students who look lazy in learning and only a few students pay attention when the teacher explains the material. Then, from the results of the students' daily test scores, it was also found that the low ability to understand mathematical concepts of grade IX students at SMP N 1, Gunuang Omeh District. The formulation of the problem in this study is how is the motivation of students to learn in mathematics subjects using the Student Teams Achievement Division (STAD) type cooperative learning model for grade IX at SMP N 1 Gunuang Omeh District for the 2023/2024 Academic Year and whether there is a significant positive influence using the Student Teams Achievement Division (STAD) type cooperative learning model on the ability to understand mathematics concepts of grade IX students at SMP N 1 Kecamatan Gunuang Omeh for the 2023/2024 Academic Year. This type of research is a quasi-experimental experiment with a Randomized Control Group Only Design research design. The population in this study is all grade IX students at SMP N 1, Gunuang Omeh District. Sampling was determined at random first by a normality test, a homogeneity test, and an average similarity test on population data. The sample in this study is class IX-2 as the experimental class and class IX-3 as the control class. The results of the analysis of the student mathematics learning motivation questionnaire data were obtained with a percentage of 72.28% with high motivation criteria and the test of students' ability to understand mathematical concepts was calculated using the t-test obtained tcount = 3.180 and and ttable = 1.672 because tcount > ttable means subtracting H0 and accepting H1 at the real level α=0.05, and by using SPSS26 Sig = 0.003 was obtained which means that sig ≤α with α=0.05.

The aim of this research is to determine the influence of the Student Teams-Achiement Division (STAD) type model by Christian Religious Education teachers on the learning motivation of class IX students at SMP Negeri 1 Ronggurnihuta Kab. Samosir TA. 2023/2024. The research method used is a quantitative method with a descriptive approach. The population was all 102 class IX students at SMP Negeri 1 Ronggurnihuta and a sample of 41 people was determined using random sampling techniques. Data was collected using a positive closed questionnaire with 41 items, namely 24 items for variable motivating the learning of class IX students at SMP Negeri 1 Ronggurnihuta Kab. Samosir TA. 2023/2024: 1) Test analysis requirements: a) positive relationship test obtained by rxy = 0.459 > ​​rtable(a=0.05,n=41) = 0.308. b) Testing a significant relationship obtained a value of tcount= 3.226 > ttable(a=0.05,dk=n-2=39)= 2.021. 2) Test the effect: a) Test the regression equation, obtained the regression equation Y ̂="34.20"+0.25X. b) Regression coefficient of determination test (r2) = 21.1%. 3) Test the hypothesis using the F test to obtain Fcount > Ftable=(a=0.05, dk numerator k=23, dk denominator=n-2=41-2=39) namely 10.36 > 1.51. Thus Ha is accepted, namely that there is a positive and significant influence of the Student Teams-Achiement Division (STAD) type learning model by Christian Religious Education teachers on the learning motivation of class IX students at SMP Negeri 1 Ronggurnihuta Kab. Samosir TA. 2023/2024 and H0 can be rejected.

Educational problems always arise along with the development and increase of students' abilities, situations and environmental conditions that exist due to the influence of information and culture as well as the development of science and technology. The geography subject for the material of the Theory of the Formation of the Universe according to the results of observations and interviews made to class X social studies 3 students at SMAN 3 Jember is considered boring material. This study used the classroom action research method. The research will be carried out as many as two cycles, if in cycle I it has been achieved as desired, namely achieved classical completeness, then the implementation of the cycle is stopped, but if the results achieved have not reached the desired one, then continued in cycle II by optimizing the researcher's hard work in applying the STAD learning model so that the expected goals are achieved. The results of learning activities in cycle II are better than learning in cycle I. The application of the STAD model learners has succeeded in increasing students' abilities and increasing student activity by 93.75%, growing awareness to always uphold cooperation in solving problems together so as to realize a high social sense between friends in school  

This study aims to find out that studying literature can effectively improve students' mathematics learning achievement with the STAD type cooperative learning model.  The type of research used is research with a qualitative approach.  Qualitative research uses descriptive or verbal data from people who have observed a behavior.  The method used is literature study.  Literature study is an activity that is closely related to the method of collecting library data, reading and taking notes as well as processing research materials.  The type of data used is secondary data.  Secondary data is data that already exists, so we just need to find and collect existing data.  The secondary data source used in this research is student learning outcomes with the STAD type cooperative learning model.  From the search results, the researchers found 7 journals relevant to the research topic.  From the journal it was found that there was an increase in student learning outcomes using the STAD type cooperative learning model.