Analysis of Murder Learning on Arithmetic Concepts Based on Retrospective Analysis

This research aims to analyze the use of MURDER (mood, understand, recall, digest, expand, and review) learning in arithmetic concepts based on retrospective analysis. The research method used is Didactical Design Research (DDR) using retrospective analysis. The population in this study were all students of class XI at Daarul Amanah High School. The sampling technique in this study used purposive sampling. This research shows that: (1) the use of the MURDER (mood, understand, recall, digest, expand, and review) learning model is able to help students understand arithmetic concepts. (2) Hypothetical Learning Trajectory or creating concepts and learning flows well is able to minimize students' Learning Obstacles, therefore didactic design is able to help students achieve learning goals, especially in mathematical critical thinking skills.