Improving Students' Mathematical Reasoning Ability through LKPD (Student Work Sheets) in Flat Sided Spaces Materials

Abstract

The purpose of this development research was to find out the form of a valid LKPD and find out the results of the development of student worksheets on flat-sided geometrical material in improving the mathematical reasoning abilities of class VIII students who met valid criteria. The development model used in this study is ADDIE which includes the stages of analyze, design, development, implementation, and evaluation. However, this research is only limited to the development stage. The instrument used to measure the validity of the developed LKPD is a validity questionnaire by expert lecturers and mathematics teachers. The validity of LKPD is assessed from the assessment of experts with a maximum score of 4 for each statement. The results of the LKPD assessment of four lecturers and two teachers are 3.85 so that it can be interpreted that the LKPD developed has a very valid category.