<![CDATA[The purpose of this research and development is to obtain empirical findings about the development of Android-based Augmented Reality (AR) and measure the effectiveness of using AR to improve problem solving skills in learning 3D spatial modeling at SD Muhammadiyah 3 Surabaya. The development model used is the ADDIE model. Based on the results of validation by material and media experts, it shows that Android-based AR is very good and feasible to be implemented in elementary school students. The average validation result of material experts and experts is 4.9. There is a significant effect between problem solving ability before being given AR treatment and after being given AR treatment. From the interpretation aspect it is 46.4%, the analysis aspect is 27.7%, the inference aspect is 37.9%, the evaluation aspect is 79.5%, the explanation aspect is 89.5%, and the self-regulation aspect is 31. ,5%. The results of research and product development can be categorized as very suitable for use in learning 3D spatial modeling.]]>
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