<![CDATA[This study uses a quantitative approach with R&D methods using the ADDIE development model. The aim of this study is to know the design, validity and effectiveness of the development of learning media of QR Code Quartet Cards. This research was conducted in the V class of SD State Wonosari 2, Semarang. The sample technique used was stratified random sampling used to select a sample with a stratured population of seven participants in a small-scale trial with details of two high-level, three middle-level and two low-level students. The data collection techniques used are nontest, which include observations, interviews, requests, qualifications and responses, as well as test techniques. The results of the media statistics test meet the eligibility aspects of 100% media expert rating (very eligible), 80.9% material expert selection. (very eligible). In addition to meeting the aspect of effectiveness proved by t-test pairs obtained a significance result of 0,00<0,05 so that H0 was rejected and Ha accepted. The N-Gain test got an average of 0.65 which belongs to the middle category and in a percentage of 65.16% so the interpretation belonging to the category is quite effective.]]>
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