THE INFLUENCE OF VAN HIELE’S LEARNING THEORY ASSISTED BY THE GEOGEBRA APPLICATION IN IMPROVING STUDENT’S UNDERSTANDING OF MATHEMATICAL CONCEPTS IN MIDDLE SCHOOL GEOMETRY TRANSFORMATION MATERIAL

• Main Author: Stefine Luhukay, Agnes
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/79751
• Institution: Institut Teknologi Bandung

Based on the results of TIMSS 2011 and 2015, and PISA 2015 and 2018, it was concluded that mathematics is a subject with low scores compared to other subjects. Judging also from the results of the last National Examination held in 2018 and 2019, the subject of geometry and measurement is material with fewer correct numbers than other subjects, namely numbers, algebra, statistics and probability. Referring to Permendikbudristek no. 16 of 2022 Article 7, teachers are expected to be able to use technology and communication devices in the learning process. In other words, education is expected to be able to bridge technological advances and learning information for students. This is the basis of this research, namely the existence of a learning theory that can improve students' understanding of concepts in the field of geometry which can be combined with the use of technology in the learning process. Van Hiele's learning theory suggests students' cognitive stages in studying geometry, namely stage 0-visualization, stage 1-analysis, stage 2-informal deduction, stage 3-deduction, and stage 4-rigor. This learning theory is applied with the help of the Geogebra application in one of the sub-subjects of geometry, namely geometric transformations, which material is studied in phase D at junior high school level in the Merdeka Curriculum. This material is also studied in phase F at high school level. This research was conducted online with the research subjects, namely class IX junior high school students and students who were divided into two groups, namely the experimental class which received learning by applying Van Hiele's learning theory assisted by the Geogebra application, and the control class by applying conventional learning. The teaching and learning process in the experimental class uses Student Worksheets (LKPD) and modules using the Geogebra application. It is hoped that the LKPD can guide the teaching and learning process according to the sequence of students' cognitive stages in Van Hiele's learning theory, while the geogebra usage module is used to train students to use the geogebra application in learning geometric transformations. With this application, it is hoped that students can gain visual experience so that they can instill the concept of transformation of an object better and more meaningfully. Data analysis of student scores is divided into two, namely the overall total score obtained by students, and the scores according to students' cognitive stages according to Van Hiele's learning theory. Overall, it was found that there was a significant increase in scores before and after the learning process, both for the experimental class and the control class. Then it can also be concluded that the average score of experimental class students is higher than the average score of control class students, meaning that there is a significant influence of the application of Van Hiele learning theory assisted by the Geogebra application in increasing students' understanding of mathematical concepts. By processing data at each stage of Van Hiele's theory, it was also found that there was a significant increase in learning outcomes before and after learning for both the experimental class and the control class at the five stages of student thinking. After conducting trials to see the influence of Van Hiele's learning theory assisted by the Geogebra application, it was concluded that there was no significant influence on stage 0, stage 1 and stage 2, namely the visualization, analysis and informal deduction stages, but there was a significant influence on students' abilities. at stages 3 and 4, namely the deduction and rigor stages, meaning that students who are taught using Van Hiele learning theory assisted by the Geogebra application have a better understanding of the concept than students who are taught using conventional methods. This can be seen from the experimental class students having a higher average score than the control class students at the higher stage of Van Hiele theory.