Abstract
This study aimed to describe; 1) The validity, effectiveness, and practicality of learning materials with Realistic Mathematics Education; 2) Improvement of students’ mathematics reasoning ability and student self-concept. This research is development research using the development model of Thiagarajan 4-D model. Learning materials that have met valid criteria according to experts, were tested in class VIII of SMP Muhammadiyah-22 Kisaran. From the results of trial I, trial II and disseminate stage were obtained : 1) the validity of learning materials that have met valid criteria according to experts; the effectiveness criteria are reviewed from: a) completeness of learning classical students; b) ideal time; c) positive responses of students to learning materials developed; and the practicality criteria based on the results of observations on the implementation of learning materials are included in the good category. 2) improvement of mathematical reasoning ability and self-concept of students using learning tools developed in terms of : a) The N-Gain score of the test of students' mathematical reasoning ability has increased, namely in the trial I was 75.78 increased to 86.91 in trial II and increased to 88.28 in the disseminate stage; b) Results of the average self-concept questionnaire in the trial I was 73.63, increasing to 78.2 in the trial II and increased to 80.07 in the disseminate stage. Keywords: RME, mathematic reasoning ability, self-concept DOI : 10.7176/JEP/10-23-10 Publication date : August 31 st 2019
Highlights
IntroductionThe role of education is important for the process of improving the ability and competitiveness of a nation in the world
Education is one of the many pillars of a country's success
The object in this study is learning materials developed with Realistic Mathematic Education (RME) to improve students’ mathematical reasoning ability and self-concept on pattern number topic, i.e. lesson plans, teacher book, student books, student worksheet, mathematic reasoning ability test, and student self-concept questionnaire
Summary
The role of education is important for the process of improving the ability and competitiveness of a nation in the world. Education has a very valuable and significant contribution to improving the quality of a nation (Muhardi, 2004). Reasoning skills are needed by students and all citizens when they study mathematics (Shadiq, 2004). This is in accordance with the statement that mathematical reasoning abilities are very important for successful mathematics learning, based on their ability to think logically (Nunes, 2010). Logical reasoning skills are important for mathematical learning that is successful and important for students' future careers (Marchis, 2016)
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