This study aims to improve the discipline of children aged 4-5 years through reward provision at KBN 30. The study was motivated by the children's low level of discipline, evidenced by a lack of adherence to classroom rules, difficulty following teacher instructions, and a lack of habituation regarding waiting for their turn, tidying up play equipment, and completing learning activities in an orderly manner. The research employed Classroom Action Research (CAR) using the Kemmis and McTaggart model, consisting of planning, action implementation, observation, and reflection stages. The study was conducted in two cycles involving 15 children aged 4-5 years at KBN 30. Data collection techniques included observation, documentation, and field notes, while data analysis was performed using quantitative descriptive methods supported by qualitative descriptive analysis. The results indicate that children's discipline improved from 50.33% in the pre-cycle stage to 69.66% in Cycle I, and further increased to 83% in Cycle II. Thus, reward provision proved effective in improving the discipline of children aged 4-5 years at KBN 30.
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