Efforts of classroom teachers in instilling self-discipline and social discipline in grade II students at SDN 139 Palembang? The purpose of this study is to find out the efforts of classroom teachers in instilling self-discipline and social discipline in grade II students at SDN 139 Palembang. The method used in this study is a qualitative method, with a descriptive research form. The data collection techniques in the study used questionnaire, interview, and documentation techniques. The Data Validity Techniques used in this study are Source Triangulation, Source Triangulation, Time Triangulation. The data analysis techniques used are Data Reduction, Data Presentation, Data Presentation. Based on research in the field, it can be known that the impact of teachers' efforts in instilling discipline that has been implemented at SD N 139 Palembang has a good effect on student discipline such as wearing complete uniform attributes, departing on time and orderly following the bender ceremony It would be good for the principal and teachers to set an example and give sanctions to students who violate school rules to train the discipline of SD N 139 Palembang students.

The problem of this research is that low mathematics learning outcomes are caused by students' low creative thinking abilities. This research aims to determine the increase in students' creative thinking abilities regarding data presentation at SDN Sukajaya through a problem based learning model, with a class V sample. The method used in this research is a quantitative experimental method with the type of Pre-Experimental Designs. The data collection technique uses observation, tests and documentation. The data analysis technique uses N-Gain. Based on the data analysis, the conclusion is obtained: there is an increase in the creative thinking abilities of fifth grade students at Sukajaya State Elementary School after using the problem based learning model in data presentation material, because seen from the results of the N-Gain test the value shows a value of 0.8, which is included in the high criteria. Calculations in this study used SPSS 26.

In class VI.A students, there are still many students having difficulty in doing statistics problems. Therefore, this research needs to be done in order to find out the learning obstacles experienced by grade VI students of SDN 6 Palembang on statistics material. Learning obstacle is divided into three types, namely ontogenic obstacle, didactial obstacle, and epistemological obstacle. The research method used in this study is a descriptive qualitative method. The instruments used in this study consisted of learning obstacle diagnostic tests, interviews, material analysis, lesson plan analysis, and textbook analysis and students of grade VI.A SDN 6 Palembang as the subjects in this study who were respondents who carried out learning obstacle diagnostic tests and interviews. Learning obstacles can be found based on the results of the analysis of learning obstacle diagnostic tests, interviews with homeroom teachers and students of class VI.A, lesson plan analysis and textbook analysis. The results of this study found learning obstacles, namely ontogenic obstacles such as lack of interest in learning mathematics and lack of student activeness in learning, didactical obstacles such as learning resources that are still limited and epistemological obstacles, namely lack of understanding of statistical concepts.

Numerical literacy is a vital skill in daily life and plays an important role in students' mathematical problem-solving abilities. This study aims to develop an assessment instrument that can measure the numeracy literacy of grade V elementary school students in understanding and applying the concept of comparative scale. This study uses a development method using a 4D development model for the stages of define, design, develop, disseminate The assessment instrument developed consists of various questions designed to test students' understanding of the comparative scale. The trial was carried out on a sample of grade V elementary school students to validate this assessment instrument. The results of the trial show that this assessment instrument has good validity and reliability in measuring students' numeracy literacy skills. This research is expected to contribute to improving mathematics learning in