The aim of this study is to determine the effect of the changes in the curriculum of primary schools and the perceptions of the teachers regarding this program in Turkey. The new (2004) curriculum is explained at the beginning of the study. Thirty-three teachers participated in this study. Qualitative research method was used to analyze the data and semi-structured interviews were used. The components of this curriculum are: themes, learning outcomes, activities and explanations. Interviews with the teachers shed light on their perceptions regarding the concept of constructivism, the constructivist program, and the advantages and disadvantages of the curriculum.