Pemahaman konsep matematis merupakan kemampuan dasar yang sangat penting bagi siswa, namun kenyataan yang terjadi di lapangan pemahaman konsep matematis siswa masih rendah. Secara teori, pendekatan saintifik berbantuan Geogebra dapat meningkatkan pemahaman konsep matematis siswa. Penelitian ini bertujuan untuk mengetahui peningkatan dan perbedaan pemahaman konsep matematis siswa yang menggunakan pendekatam saintifik berbantuan Geogebra dan yang menggunakan pembelajaran biasa. Penelitian ini merupakan penelitian kuantitatif dengan metode eksperimen pada populasi siswa kelas XI MIA MA Negeri 1 Kerinci. Sampel penelitian ini adalah kelas XI MIA 1 sebagai kelas eksperimen dan kelas XI MIA 2 sebagai kelas kontrol yang dipilih melalui teknik random sampling. Instrumen yang digunakan adalah tes untuk mengukur pemahaman konsep matematis siswa. Untuk mengetahui peningkatan pemahaman konsep siswa digunakan rumus N-gain, sedangkan untuk mengetahui perbedaaan pemahaman konsep matematis siswa kelas eksperimen dan kontrol dilakukan uji-t. Hasil analisis data menunjukkan bahwa terdapat perbedaan signifikan peningkatan pemahaman konsep matematis siswa yang menerapkan pendekatan saintifik berbantuan Geogebra dan yang menggunakan pembelajaran biasa.The mathematical concepts understanding was a basic ability that must mastered by students. In the fact, the students’ mathematical concepts understanding was still low. By the thoery, the scientific approach assisted Geogebra can improve students' mathematical concept understanding. This research aims to determine the improvement and differences in mathematical concepts understanding of students who used scientific approaches assisted Geogebra and the students’ who used ordinary learning. This research was a quantitative research with experimental methods and eleventh-grade of science students (MIA) in MA Negeri 1 Kerinci as population. The sample of this study was XI MIA 1 students as an experimental group and XI MIA 2 students as a control group that selected through random sampling technique. The instrument used was test to mesaure the students’ mathematical concepts understanding. To determine the increasing of students’ mathematical concepts, N-gain formula was used. While t-test was used to determine the differences in mathematical concepts understanding of students in experimen and control group. The result of data analysis shown that there is the significant difference in students’ mathematical concepts understanding who used scientific approaches assisted Geogebra and the students’ who used ordinary learning.
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