Learning direct proportion by using the context of timpan recipes

Successful learning is not only based on students' final grades but also on the learning process itself. The process is crucial to assess students' understanding of mathematics concepts. This study aims to describe the learning activities of direct proportion using the realistic mathematics education (RME) approach implemented in the hypothetical learning trajectory (HLT) trial. The HLT was developed in the context of timpan recipes which is appropriate to the characteristics of students in Aceh. This study used design research method that involves two stages, preparation and learning trial. This HLT trial involved 20 seventh graders in a junior high school in Banda Aceh, Indonesia. Data were obtained through the observation sheet, field notes, and interview. The results showed that the students were actively involved during the HLT trial, thoughtfully analyzed the problems, positively responded to the learning, appropriately chose and used procedures or operations in solving the issues related to direct proportion. Also, the class performed effective interaction among students and the teacher.