<![CDATA[This development research aims to: 1) Determine the validity of the educational game "Snakes and Ladders" mathematics learning media, 2) Determine the practicality of the educational game "Snakes and Ladders" mathematics learning media, 3) Determine the effectiveness of the educational game "Snakes and Ladders" mathematics learning media. This research is a Research and Development (R&D) study using the ADDIE development model, which consists of five stages: 1) Analysis, 2) Design, 3) Development, 4) Implementation, and 5) Evaluation. Data collection techniques in this study were questionnaires, tests, and documentation. The instruments used were 1) a questionnaire in the form of a validation questionnaire by experts to determine the product's validity and a student response questionnaire to determine its practicality, 2) a test sheet for the effectiveness of the developed product. Validation was carried out by media experts and material experts, who then conducted a product trial by observing the response to product use and student test results based on mathematical problem-solving abilities. The trial was conducted on 20 students in grade VIII of MTs Negeri 3 Padangsidimpuan. Based on the results of this study, the product's validity was obtained with an average percentage of 91.6%, categorized as "Very Valid," the product's practicality was obtained with an average percentage of 86.5%, categorized as "Practical," and the product's effectiveness was obtained with an average percentage of 89%, categorized as "Effective."]]>
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