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Abstract This study aims to produce a learning trajectory that assist student to understand in the study of proportion. The learning approach used Pendidikan Matematika Realistik Indonesia (PMRI). This research used design research that are three phases, preparing for the experiment, the design experiment, and the retrospective analysis. Musi tour context used in the series of learning activities to developing Hypothetical Learning Trajectory (HLT). Then, HLT has been designed compared with actual learning during the teaching experiment. Theoretical development implemented through an interactive process on three phases of design research that aims to giving contribution about Local Instruction Theory (LIT) for assist student studying proportion. Interviews, video recordings, photograph and giving pretest and posttest are undertaken to collect the data. The result of the retrospective analysis is Musi tour context as a learning model can assist student understand in the study of proportion.
Nursa et al. (Sun,) studied this question.