The research aims to improve the learning of sideways force shot put through a baseball modification tool for students of grade VI primary school 1 Sumbermulyo in the 2018/2019 school year. Classroom action research, the research subjects were Grade VI students of primary school 1 Sumbermulyo, Banyuwangi Regency with a total of 26 students consisting of 13 male students and 13 female students. As for the data collection method used in this study was to use three aspects namely psychomotor aspects, aspects affective and cognitive aspects. The results of the study show that the improvement in the learning outcomes of Grade VI students on sideways force shot learning materials by using baseball tools modification in primary school 1 Sumbermulyo in the academic year 2018/2018. Based on the results of tests of psychomotor aspects, affective aspects and cognitive aspects at the beginning of learning the mastery value of students by 34.61% of students who were able to do the three aspects correctly, in the first cycle there was an increase in the mastery value of 53.84% of students who were able to do the three aspects correctly continued in the second cycle also increased to 76.92% of students who were able do three aspects right.