<![CDATA[Physical education in elementary schools is crucial for improving students' gross motor skills, especially in Phase B, which is a crucial stage in children's motor skill development. Therefore, a valid and reliable instrument is needed to evaluate gross motor skills so that the results can be used objectively as a basis for developing educational objectives. The purpose of this study was to analyze the validity and reliability of gross motor skills tests in Phase B elementary school students. This study used a quantitative approach with a cross-sectional and descriptive analysis design. The subjects were Phase B elementary school students who participated in gross motor skill measurements during one data collection period. The gross motor examination that assessed manipulative, locomotor, and non-locomotor skills was used as a research tool. Product Moment Correlation was used for validity testing, and Cronbach's Alpha coefficient was used for reliability testing. The majority of test items had significant correlation coefficients (p < 0.05), according to the results of the study, and were considered valid; however, several questions needed to be revised because they did not meet validity requirements. The instrument demonstrated reliable internal consistency, as indicated by the Cronbach's Alpha rating of 0.71 in reliability testing. Therefore, the gross motor skills test is considered suitable as a tool to evaluate gross motor skills in elementary school students in Phase B, although some aspects need to be improved to enhance the overall quality of the instrument.]]>
