THE DEVELOPMENT OF STUDENT WORKSHEETS BASED ON REALISTIC MATHEMATICS EDUCATION TO IMPROVE THE SIXTH GRADE STUDENTSCRITICAL THINKING ABILITY ON THE MATERIAL OF COUNTING FRACTION OPERATIONS

Mathematics has an important role at every level of education and is a means of solving problems in life. Mathematics will increasingly provide benefits with the support of the ability to think logically-reflective to make rational decisions that are believed to be true. Student worksheets as a learning medium can combine mathematics and critical thinking skills in learning. This study was aimed to produce student worksheets based on realistic mathematics education to improve students critical thinking skills that are valid, practical and effective. The research was conducted by using Borg & Galls R&D design, but only eight steps were taken, in the form of preliminary research, development planning, initial product design development, initial product validation, initial product revision, trial use, product development revision and effectiveness testing product. The research subjects were 58 grade VI students of SDN Sumberagung 01 Jember. The data were collected by using documentation, interview, product validation, and test learning outcomes. After the data were collected, the data were analyzed by using the following techniques: product validation, t-test, and relative effectiveness test. The results of the study stated that the validity of the student worksheet development product showed 93.96% (very worthy), the productivity of the student worksheet product showed 74.71% (practical), the field test results showed that the worksheet product from this study was more effective than with the previous product, and the relative effectiveness level obtained was 62.57% (high effectiveness). Thus, it can be concluded that the product of developing student worksheets based on realistic mathematics education can improve students critical thinking skills on the fraction counting operation material.