The research aims to improve student learning achievement on the subject of stoichiometry in class XI MIPA SMA N 9 Pekanbaru. This research was a experiment with randomized group pretest-posttes design. The sample of this study was X IPA 5 as experiment class and X IPA 6 as control class after being tested for normality and homogeneity tests. Normality test was performed using Liliefors test. T…