<![CDATA[Students are less accustomed to working on problem-solving questions; this lack of familiarity affects their ability to solve problem-solving questions that are presented after routine questions. In addition, there has been no development of teaching modules carried out by teachers. Therefore, the purpose of this study is to develop a teaching module assisted by Quizizz to improve the ability to solve elementary school mathematics problems that are valid, practical, and effective. This type of research includes development using the ADDIE model design. The data collection methods used are teaching module validation sheets, response questionnaires, and problem-solving questions. The study's findings revealed that the validity of the instructional material, with an average value of 95.69, falls inside the "very valid" category. The practicality assessment conducted by the teacher and coworkers yielded average scores of 87.07 and 85.34, respectively, categorizing them as "very practical." The efficacy assessment is based on the paired sample t-test results, which demonstrate a significance value (2-tailed) of 0.000, signifying a difference in average scores between the pretest and posttest. Furthermore, the n-gain analysis produced a value of 0.519, classifying it as "moderate." The findings demonstrated that the training module that was created was valid, practical, and effective in enhancing mathematical problem-solving skills]]>
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