This study to develop referee Smart Card learning media as a means of learning basketball referee signals for extracurricular participants at the high school, vocational high school, and madrasah Aliyah levels. This research uses the Research and Development (R&D) method by adapting the Borg and Gall development model which consists of ten steps, namely (1) Initial information gathering, (2) Planning, (3) Initial Product manufacturing, (4) Expert validation, (5) Initial product revision, (6) Small scale trial, (7) Small scale product revision (8) Large scale trial (9) Final product (10) Mass production. The result of material and media expert validation showed that the product obtained an average assessment of 89,5% with Very Good criteria. Small scale trials were carried out Senior High School 1 Nalumsari and obtained an average score of 85,4% in the Good category. The large scale trial was conducted at Senior High School 1 Pecangaan, Vocational High School 3 Jepara , and Madrasah Aliyah 1 Jepara with the average assessment results of 96%, 91%, and 90% respectively, so that the total overall average reached 92% with the Very good category. Based on these results, it can be concluded that the Referee Smart Card media is feasible and effective to use as a medium for learning basketball referee signals in extracurricular activities. This media is expected to be able to improve participants’ understanding visually, practically, and interactively.
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