Nuraini, Siti2022-03-152022-03-152021-10wahyu sari yenihttps://repository.unri.ac.id/handle/123456789/10495School Participation Rate (SPR) is a basic indicator used to measure access to education, especially for the school-age population. Riau has fluctuating SPR data for senior high school level. In this study, the nonparametric multivariate adaptive regression splines (MARS) method was used to model the high school participation rate in the Regency/City of Riau Province in 2015-2019. Factors that are thought to affect the SPR in Riau Province are human development index, gross regional domestic product, poverty level and number of schools. This study shows that the best MARS model with a minimum GCV value of 19.83156 and an R-square of 0.745368. The most influential variable for SPR in Riau Province in 2015-2019 is the poverty rate with a 100 percent interest rate.enNonparametric regressionmultivariate adaptive regression splines (MARS)school participation rateArticle