This study aims to determine the effectiveness of the application of the demonstration method in improving the concentration of early childhood (AUD) in group B of ASASUT TAQWA Kindergarten, Selodakon, Tanggul District in the 2024–2025 academic year. This study uses a Classroom Action Research (CAR) approach with the Kemmis and McTaggart model consisting of two cycles, each through the planning, action, observation, and reflection stages. The research subjects were 17 children aged 5–6 years. Data were collected through observations based on six concentration indicators: children's involvement in learning, understanding concepts, social interaction, focus, accuracy in answering questions, and active asking attitudes. The results of the study showed that in Cycle I most children were still in the undeveloped category. However, after improvements in Cycle II, there was a significant increase in all indicators, with the majority of children reaching the developing category as expected. These findings indicate that the demonstration method is effective in improving the concentration of early childhood through the presentation of concrete, interactive, and fun materials.
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