Self-confidence is very important for students to actualize their potential and information on the level of student confidence is very helpful for teachers as a basis for decision making, as well as providing feedback to improve the learning process. This study aims to investigate whether there is a positive and significant relationship between self-confidence and student mathematics achievement. This research uses quantitative research methods, namely ex post facto type with a population of VII grade students of SMP Puspita Tangerang which consists of 5 classes total 188 students. Determination of the number of samples looked at the table of Issac and Michael with α = 0.05 and obtained a sample of 123 students. The data analysis of this study used a high confidence level of 95%. Based on the results of the simple linear regression test, it is found that the equation Ŷ = 21,714 + 0,374x means that there is a positive and significant relationship between self-confidence and student mathematics achievement. Then, the simple correlation coefficient test result count.

The relationship between confidence and mathematics learning achievement of junior high school students

Mathematical communication skills are one of the important abilities possessed by students in learning mathematics Based on several results of the literature study showed that students' mathematical communication skills are still relatively low One effort that can be done to improve students' mathematical communication skills is to apply the 7E learning cycle learning model The purpose of this study is to investigate the improvement in mathematical communication skills of students who use the 7E learning cycle learning model is higher than students who use conventional learning This type of research is a quasi-experiment using pre-and posttest design The population in this study were students of class VIII of Junior High School 1 Gantung and the sample of this study was students of grades VIII C and VIII D The sampling technique used was convenience sampling The research instrument used to answer the problem formulation was an instrument of mathematical communication ability test in the form of the problem description The subject in this study is the prism material The formulation of the problem in this study was answered by inferential statistics using the pooled variance model t-test The results showed that an average increase in mathematical communication skills was 0330 for the experimental class and 0241 for the control class so that the conclusion was that the increase in mathematical communication skills of students who used the 7E learning cycle learning model was higher than that of students using conventional learning

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Papers

The application of learning cycle 7E model to improve a mathematics communication skills of junior high school students