Electronic Theses and Dissertation

Penelitian ini dilatarbelakangi oleh rendahnya pemahaman konsep matematis siswa pada materi transformasi geometri. Salah satu penyebabnya adalah penggunaan model pembelajaran yang belum mampu melibatkan siswa secara aktif dalam proses menemukan dan membangun konsep matematis. Salah satu upaya yang dapat dilakukan untuk mengatasi permasalahan tersebut adalah dengan menerapkan model Discovery Learning berbantuan GeoGebra, yang dapat mendorong siswa menemukan konsep secara mandiri melalui visualisasi interaktif. Penelitian ini bertujuan untuk mengetahui peningkatan pemahaman konsep matematis siswa pada materi transformasi geometri melalui model Discovery Learning berbantuan GeoGebra. Penelitian ini menggunakan jenis penelitian pre-eksperimen dengan desain One Group Pretest–Posttest Design. Sampel penelitian terdiri atas 18 siswa kelas XI SMA. Instrumen penelitian yang digunakan berupa soal uraian kemampuan pemahaman konsep matematis siswa pada materi translasi dan refleksi yang diberikan sebelum dan sesudah perlakuan. Data dianalisis menggunakan uji paired sample t-test setelah memenuhi uji prasyarat berupa uji normalitas. Hasil penelitian menunjukkan bahwa nilai t_hitung=7,831 lebih besar daripada nilai t_((0,05;17))=1,740 sehingga H_0 ditolak. Dengan demikian, penerapan model Discovery Learning berbantuan GeoGebra dapat meningkatkan pemahaman konsep matematis siswa pada materi transformasi geometri.

Kata kunci: Discovery Learning, GeoGebra, Pemahaman Konsep Matematis, Transformasi Geometri.

This study was motivated by students’ limited understanding of mathematical concepts related to geometric transformations. One of the causes is the use of instructional models that have not been effective in actively engaging students in the process of discovering and constructing mathematical concepts. One approach that can be taken to address this issue is to implement a GeoGebra-assisted Discovery Learning model, which can encourage students to discover concepts independently through interactive visualization. This study aims to determine the improvement in students’ mathematical conceptual understanding of geometric transformations through the Discovery Learning model supported by GeoGebra. This study employed a pre-experimental design using a One-Group Pretest–Posttest Design. The sample consisted of 18 11th-grade high school students. The research instrument used was an essay-type test assessing students’ mathematical conceptual understanding of translation and reflection, administered before and after the intervention. The data were analyzed using a paired-sample t-test after meeting the prerequisite of normality. The results of the study showed that the calculated t_(value )=7,831 was greater than the critical t_((0,05;17))=1,740 therefore, H₀ was rejected. Thus, the implementation of the Discovery Learning model aided by GeoGebra can improve students’ understanding of mathematical concepts in the topic of geometric transformations.. Keywords: Discovery Learning, GeoGebra, Understanding of Mathematical Concepts, Geometric Transformations.