This study was conducted by One Group Pretest-Posttest Design. The sample subjects were Mathayomsuksa 2 students who were studying in the first semester, academic year 2015 at Phiboonrakpittaya School, Phiboonrak District, Udon Thani Province.They were selected by Cluster Random Sampling. The research instruments were lesson plans, mathematics achievement test. The collected data were statistically analyzed for frequency, percentage, mean, standard deviation and t-test for Dependent.