The problem in this study is the low activity, critical thinking skills, and student learning outcomes in the subject of science, which is caused by less meaningful learning, one-way, and a lack of activities to sharpen critical thinking. The solution applied is the MAHIR learning model. The purpose of this study is to describe teacher activities and analyze student activities, critical thinking skills, and learning outcomes. The study used a qualitative approach with Classroom Action Research (CAR) during three meetings in grade V SDN Pangeran 2 in the 2024/2025 academic year, with nine students as subjects. Data were collected through observation and written tests, then analyzed descriptively using cross tables. The results showed that teacher activity became "Very Good", student activity increased from 44% to 89%, students' critical thinking skills increased from 33% to 89%, and student learning outcomes completion increased from 44% to 89%. In conclusion, the MAHIR model is effective in improving the quality of learning. This model is recommended for teachers, principals, and researchers as an innovative alternative in learning.