Mathematics Curriculum Reform and Its Implementation in Textbooks: Early Addition and Subtraction in Realistic Mathematics Education

Since the late 1960s, a reform in mathematics education, which is currently known under name Realistic Mathematics Education (RME), has been taking place Netherlands. Characteristic for this approach to education that not seen as ready-made knowledge but an activity of learner. Although much written about big ideas and intentions RME, multiple RME-oriented textbooks have published, up now development thoroughly investigated. In research reported article, we traced how RME evolved over years. The focus our study was on early addition subtraction primary school. For this, studied core curriculum documents analyzed published between onset present. We found teaching principles were clearly reflected learning facilitators steadily present years, although some made concrete further detail. Furthermore, all also be textbooks, though cases other ways than originally intended. Our shows complexity process its implementation textbooks.