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Abstract
Mathematics learning in early elementary school plays an important role in building students' understanding of numeracy concepts. However, in practice, learning is still often dominated by lecture methods and limited use of media. This occurs at Muhammadiyah Purwodiningratan 1 Elementary School, which tends to be teacher-centered and lacks variety in the use of media, resulting in students becoming passive and experiencing difficulties in understanding basic arithmetic concepts. The type of research used was Research and Development (R&D) with the Borg and Gall procedural model. The research tools used were validation sheets given to media experts, subject matter experts, and learning experts. Data analysis techniques included quantitative and qualitative methods. Based on the validation results, the media was declared suitable for use with a detailed conversion score from media experts of 77.5 (Good Category), subject matter experts of 87.5 (Very Good Category), and learning experts of 75 (Good Category). Overall, the average assessment of the three experts reached a score of 80, indicating that the “Counting Cards” media is in the good category and suitable for use in teaching mathematics to first-grade elementary school students and is able to help students understand the concepts of addition and subtraction in a more concrete and interesting way.
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