Abstract
Mathematics learning in elementary schools continues to face challenges, including students’ perceptions of mathematics as difficult, procedural teaching practices, and low engagement. These challenges highlight the need for instructional approaches that improve student learning and foster teachers’ pedagogical transformation. This study examined the pedagogical transformation of elementary school teachers who teach mathematics following the implementation of the GASING method in their teaching. A mixed-methods sequential explanatory design was employed involving 27 teachers, of whom 6 selected for interviews. Data were collected through questionnaires and semi-structured interviews and were analyzed using descriptive statistics and thematic analysis. The findings indicate that teachers’ pedagogical transformation was high across the dimensions of perceptions, pedagogical strategies, and professional reflection. Teachers increasingly view errors as learning opportunities, adopt more contextual and student-centered instructional strategies, and engage more actively in professional reflection. These findings suggest that the GASING method can support teachers’ pedagogical transformation and contribute to more meaningful, reflective, and student-centered mathematics learning in elementary schools in Indonesia.