The aims of this research are: 1) to identity the significance of PowerPoint presentation utilization on the mathematics achievement of the students of elementary school, 2) to depict the significance of the studentsâ learning styles on mathematics achievement of the students of elementary school, and 3) to identity the presence of interaction between the studentsâ learning styles and the utilization of PowerPoint presentation on the mathematics achievement of the students of elementary school. Pilot instructional design is the PowerPoint â utilizing one, while the control design is the conventional one. Learning styles includes: visual, auditorial and kinesthetic learning styles. The population of this research is students of elementary schools in Madiun Municipality. The results of the research are: 1) the PowerPoint utilization in math class can significantly increase the studentsâ achievement, 2) the studentsâ learning styles significantly influence the studentsâ achievement.           The visual learning styles are stronger than auditorial and kinesthetic which similar, and 3) there is interaction between conventional and attested studentsâ learning styles. Under conventional learning strategy, studentsâ learning styles do not influence the student achievement. Under the pilot learning strategy by utilizing PowerPoint presentation, the studentsâ learning styles influence the studentsâ achievement. Kinesthetic and auidtorial learning styles similarly influence the studentsâ achievement, but visual learning style results in a better studentsâ achievement. The utilization of the PowerPoint presentation program does not significantly influence the achievement of the students with visual and kinesthetic learning styles, but it significantly influences the achievement of the students with auditorial learning style.Key words      :  The Mathematics Achievement of The Students of Elementary School, Powerpoint Class Presentation, and The Basis of The Studentsâ Learning Styles
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