This report is about the designing and the implementation of a contextual problem in the topic of matrix. Up to now, matrix is taught in the secondary school in Indonesia in a traditional way. It means the contents deal only with numbers and operations, lack of the applications or real-life situations.
In the next section, a series of problems about matrix are designed based on the realistic mathematics education theory. RME theory has five tenets or characteristics (de Lange, 1987; Treffers, 1991):(1) phenomenological exploration or the use of contexts; (2) use of models or bridging by vertical instruments; (3) the use of students own productions and constructions or students contribution; (4) the interactive character of the teaching process or interactivity; and (5) the intertwining of various learning strands.
In the section 3, the reflection of these characteristics to the problems will be discussed.