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In this study, it was aimed to investigate the effect of Realistic Mathematics Education (RME) approach on students' mathematics achievement in middle school mathematics lessons. For this purpose, a 6-week program was created in which the RME approach was employed. In order to determine the effectiveness of this program, an experimental group using the RME approach and a control group using traditional teaching method were randomly determined. In order to reveal the effect of the program prepared with RME on mathematics achievement, a "mathematics achievement test" was used at the beginning and end of the experiment. The findings showed that the RME approach has a positive effect (effect size 0.6721) on academic achievement compared to the traditional teaching method. Based on the results obtained, it is recommended to be used in mathematics lessons since the RME approach increases academic achievement. [ABSTRACT FROM AUTHOR]

In this study, it is aimed to develop a valid and reliable achievement test for the subject of "Cell" belonging to the 6th grade "Systems in our Body" unit within the scope of Science course. The achievement test was prepared as a 25-item multiple-choice test, considering the cell-related objectives in the 6th grade Science curriculum. The pilot study of the test was carried out with 62 students attending 6th grade in 2017-2018 academic year. The comprehensibility and the consistency with the scientific knowledge of the test items were prepared by the opinions of various experts in the field of science education. The item analysis was performed according to the answers of the students in the achievement test, and the discriminant and difficulty indexes were calculated for each item. After the item analysis, 3 items were excluded from the test and a Cell Achievement Test (CAT) consisting of 22 questions was obtained. The mean item difficulty of CAT was 0.652 and the mean discrimination index was 0.507. [ABSTRACT FROM AUTHOR]

The purpose of this research is to conduct validity and reliability studies within the context of the development of the Mathematical Literacy Self-Efficacy Scale for middle school students. In the scope of the study, explanatory factor analysis, confirmatory factor analysis and Cronbach alpha internal consistency coefficient reliability calculations were made to the data obtained from 1124 students who were studying in the 7th grade of the public schools of central districts in Adana province. In order to determine the discrimination power, Independent groups t test was applied between group scores. As a result of the analyzes made, it is seen that the scale consists of 30 items with 4 subcomponents and has a .925 Cronbach alpha internal consistency coefficient and is at a distinctive level. The scale explains 48.34% of the total variance. In addition, the confirmatory factor analysis carried out in order to test the adequacy of the obtained structure shows that the resulting model is acceptable. The results have shown that the Middle School Mathematical Literacy Self-efficacy Scale is a valid and reliable measurement tool. [ABSTRACT FROM AUTHOR]