Implementation of lesson study with rigorous mathematical thinking based on student worksheet to enhance the students’ mathematical critical thinking

Abstract

This article is an implementation of lesson study with an RMT-based student worksheet which aims to enhance students' mathematical critical thinking skills. The subjects of this study were 32 students of class VII A in MTsN 1 South Lampung, who represented: (1) different mathematical learning styles; and (2) different self-efficacy. Research begins with a plan, then begins to implement and reflect. The instruments of this study were students' worksheets based on RMT integer and fraction topics, Mathematical Learning Style (MLS) questionnaire, self-efficacy questionnaire, test instrument of critical thinking, and observation sheet. This study aims to improve students' critical thinking skills with the help of Student Worksheets based on RMT in terms of MLS and student self-efficacy. Based on the results of the study, students with Self-Expressive Learning (SL) and Mastery Learning (ML) learning styles experienced a high increase in critical thinking skills with N-gain scores of 0.73 and 0.71, respectively. While students with Understanding Learning (UL) and Interpersonal Learning (IL) learning styles have increased critical thinking skills in the medium category with N-Gain scores of 0.64 and 0.63. Students with high self-efficacy have increased high critical thinking skills. Students with intermediate self-efficacy experience an increase in mathematical critical thinking skills in the medium category.