Abstract

This study aims to explain teacher activity, student activity, and learning outcomes  using a combination of heads numbered together with problem-based learning, a learning model of volume cube materials. Using a qualitative approach and the type of Classroom Action Research (CAR) conducted in two cycles. The  subjects of the study were 31 students in the class VSDN Quinceratan 1 Banjarmasin in the 2021/2022 school year. The data types  used are qualitative  and quantitative. Data acquisition techniques were performed using teacher activity observation sheets, student activity, and student learning outcomes. The results showed that the activities of the first cycle teacher with the "good" category increased with the "very good" category in the second cycle. Student activity also increased, namely the first cycle with the "active" category to the "very active" category in the second cycle. Meanwhile, students' learning mastery experienced success, namely achieving individual and classical mastery. Suggestions that can be given by this model can be used as material for consideration or information in order to choose models and learning media in teaching to increase teacher activity, student activity, and also student cube volume learning outcomes so that it becomes more optimal.