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**Abstract**

The aim of this study is to investigate the foundations and principles of a competency-based curriculum in elementary education. The research method is descriptive-analytical, using library resources. The findings showed that the independence and continuity of any society depend on its education system. Education of individuals in society is the foundation of the educational system, and curriculum planning is considered the most important pillar of this system. In Iran's education system, the curriculum is a key factor in achieving the goals of the education system. If the output of the curriculum at the elementary level—which is the most important educational stage—is not aligned with the goals of the country's education system, the expected objectives cannot be achieved. The competency-based approach...