Nurhidayati, A.; Sudargono, A.; Rohsulina, P. APPLICATION OF SNOWBALL THROWING TO IMPROVE THE LEARNING OUTCOMES OF SOCIAL SCIENCE (IPS) GEOGRAPHY OF STUDENTS IN GRADE VIII C MUHAMMADIYAH 1 JUNIOR HIGH SCHOOL SUKOHARJO IN THE ACADEMIC YEAR 2017/2018. J. Geogr. Sci. Educ. 2019, 1.