<![CDATA[This research aims to develop and determine the effectiveness of the Smart Box Mathematics learning media in mathematics subjects with material on adding numbers 1-10 for grade 1 elementary school. This research uses the Research and Development research method. The subjects in this research were 1st grade elementary school students, totaling 16 students. Data collection techniques use pretest questions, posttest questions, interest questionnaires, student responses and teacher responses. Data was analyzed quantitatively and qualitatively. The research results show that the development of Smart Box Mathematics learning media for grade 1 elementary school students carried out by researchers was declared valid based on the assessment of validators consisting of two experts, namely media experts and learning design experts. Validation carried out by media experts got a percentage of 96%, while validation from learning design experts got a percentage of 97.6%. The research results also show that the Smart Box Mathematic learning media is said to be effective, which can be seen from the increase in learning outcomes before and after using the Smart Box Mathematic learning media with an average pretest score of 54.69 and after learning using the Smart Box Mathematic learning media the average posttest was 76.56. This shows that there is a difference in the average pretest and posttest of 21,875, so it can be said that there has been an increase in student learning outcomes. From the results of distributing interest questionnaires given to students, it can be seen that students have experienced a significant increase in interest in learning mathematics. Thus it can be concluded that the Smart Box Mathematics learning media is declared valid, effective and practical.]]>
