This study aims to determine the use of Educaplay media in diagnostic assessmentbased on Three-Tier Multiple Choice to reduce elementary school students'mathematical misconceptions. A quantitative approach with a pre-experimentaldesign was used to compare learning outcomes between the experimental andcontrol groups. The subjects of the study were 30 fourth-grade elementary schoolstudents who were randomly divided into two groups. The research instrumentswere the Three-Tier Multiple Choice test based on Educaplay, studentquestionnaires, and observation sheets. The results showed that the use ofEducaplay significantly reduced the level of student misconceptions and increasedconceptual understanding. Educaplay media is considered effective as anassessment tool that is able to present questions in an interesting and reflectivemanner for students.
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