This article describe the findings of second year research out of three years planning on the development of learning materials about fraction in elementary education based on realistic mathematics education (RME) theory. This research has been conducted through development research approach. The main aspect of this approacnh is cyclic process of through experiment and teaching experiment. The research holds the description of learning trajectory about faction for elementary education. The trajectory consists of several themes relevant to local contexts following the sequences of: (1) fair sharing; (2) repeated division by two (halving) ; (3) repeated division by 10; (4) decimal and percent.