Abstract
The low critical thinking skills, learning interest, cooperation, and learning outcomes of third-grade students of SDN Panca Karya on the material of multiplication of whole numbers indicate the need for more active and meaningful learning. This study aims to analyze the effectiveness of the combination of PBL, STAD, and GBL models in improving teacher activity, student activity, critical thinking skills, learning interest, cooperation skills, and learning outcomes. The study used Classroom Action Research (CAR) which was carried out in four meetings on 12 third-grade students of SDN Panca Karya in the second semester of the 2025/2026 academic year. Data were collected through observation, evaluation, and documentation, then analyzed descriptively quantitatively and qualitatively. Teacher activity increased from 78% to 100%, student activity from 33% to 100%, critical thinking skills from 33% to 100%, learning interest from 58% to 100%, cooperation skills from 58% to 100%, and learning outcome completion from 33% to 100%. The combination of PBL, STAD, and GBL models effectively creates more active, collaborative, and meaningful mathematics learning so that it can improve the quality of the learning process and outcomes of elementary school students.