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The use of the balance-scale model for the learning of equation topic has often been used. However, based on limited observations, the use of the model has not been systematic and less based on learning theory. This study aims to design teaching materials about linear equations in one variable with a model of balance-scales based on realistic mathematics theories intended for junior high school students. For this purpose, we used design research, particularly the preliminary design phase. First, we compiled the material based on curriculum and mathematics textbooks. This practical view was used as consideration in designing a learning sequence. Second, the practical learning sequence was revised based on the theory of realistic mathematics education. This theory was used because it gives meaningful mathematics learning to the students. Third, we organized a focus group discussion to review and improve the design intend to produce a learning sequence that can further be used for the teacher for the teaching experiment. The results included learning sequence in the form of learning materials on the topic of linear equations in one variable with a balance-scale model. We conclude that the designed learning sequence for this topic provides more meaningful than conventional learning for the students.