Fatimatul Khikmiyah, Agung Lukito, Sitti Maesuri Patahudin
Previous researchs shows that speed is one of the most difficult in the upper grades of primary school. It is because students must take into consideration of two variables; distance and time. Nevertheless, Indonesian students usually learn this concept as a transmission subject and teacher more emphasizes on formal mathematics in which the concept of speed given as "distance by time"rigorously. A sequence of learning activities with toy cars context was designed based on students' development and Realistic Mathematics Education (RME) principles which are guided reinvention, didactical phenomenology and emergent modelling. Using their own models, students are able to explain a proportion among distance and time in speed as well the relationship of it. © 2012 Journal on Mathematics Education.All Rights Reserved.
Muhammadiyah University of Gresik, Indonesia; Universitas Negeri Surabaya (UNESA), Surabaya, Indonesia
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