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Abstract. This research aims to design an algebra learning sequence on the topic of linear equations in one variable—which was taught in Junior High School. We used design research method to do this, and preliminary design phase in particular. First, we designed a sequence of daily life problems in order for students can be familiar with this. This sequence of problems was used for designing a learning sequence. Next, we designed a sequence of learning according to the theory of Realistic Mathematics Education because this theory provides meaningful mathematics for students. Finally, we discussed the design to obtain final learning sequence for a teaching experiment. We consider that the result of the learning design is better than the conventional learning sequence, and it is more meaningful for students.