Abstract. This study aims to describe whether flannel board media can further improve the early mathematical concept abilities of 4-5 year old children at Segara Muncar Kindergarten in the 2024/2025 academic year. The research method used in this study is classroom action research (CAR) conducted through two cycles, consisting of planning, action, observation, interviews, and documentation. The data collection techniques used include interviews, observation, and documentation. The data analysis techniques used were qualitative descriptive to describe the research results and quantitative to calculate numerical data. The results of this study showed that in the pre-cycle, children's early mathematical skills only reached 33%. In cycle I, children's early mathematical skills increased by 20%, reaching 53% in cycle I. In cycle II, children's early mathematical skills increased by 33% , reaching 86% in cycle II, which means the criteria for very good development with a percentage of 80% have been achieved in this study. On average, children's initial mathematical ability improved, especially with the use of flannel board cards to improve the initial mathematical ability of 4-5-year-old children at Segara Muncar Kindergarten in the 2024/2025 academic year. Keywords: Children's Early Mathematical Concepts, Flannel Board Media.
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