PENERAPAN MODEL PEMBELAJARAN BERBASIS PROYEK (PROJECT-BASEDLEARNING) UNTUK MENUMBUHKAN KEMAMPUAN BERPIKIR KRITIS SISWA SDDALAM MEMAHAMI KONSEP GEOMETRI.

Abstract

This research is driven by the challenges elementary school students face in comprehending abstract geometric concepts, which often results in low critical thinking abilities. The objective of this study is to analyze the effectiveness of the Project-Based Learning (PjBL) model in enhancing students' critical thinking skills within geometry topics. The research method employed is Classroom Action Research (CAR), comprising planning, implementation, observation, and reflection phases. Research instruments include student activity observation sheets and critical thinking skill tests measuring aspects of analysis, evaluation, and inference. The findings indicate that through structured project stages— ranging from essential questions to the creation of 3D geometric models—students become more proactive in solving spatial problems and are able to relate geometric concepts to everyday life. The study concludes that the PjBL model significantly fosters the critical thinking skills of elementary students and creates a more meaningful mathematics learning experience.