<![CDATA[This research was conducted to innovate smart board media to introduce the concept of measurement that is valid, practical, and effective for group B children in Anggrek Pre-School, Rambang District. The research used the Research and Development (R&D) method with the ADDIE research model (Analysis, Design, Development, Implementation, Evaluation). The population of this study was Anggrek preschool students in Rambang District. The small group trial sample was 6 children and the large group trial was 12 children with data collecting techniques using interviews, observations, documentation, and questionnaires. Validity, practicality, and effectiveness analysis techniques were carried out in this study. The results showed that the smart board media on the concept of introducing measurement was developed based on the results of the material expert assessment of 89.7%, which is very valid, the results of the media expert assessment of 93.1%, which is very valid, the results of the teacher practitioner assessment of 96.6% are very practical and based on the results of the instrument questionnaire on children conducted in the form of interviews and observations, namely the results of the small group trial of 88.1%, and the large group trial obtained 92% at the second trial stage, which was declared very good. It is concluded that the development of smart board media on the concept of introducing measurement is suitable for learning and effective.]]>
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