The aim of this study is generally to obtain accurate informsi to improve the learning outcomes of students in the fourth grade science teaching in State Elementary School 38 Mempawah Hulu.Metode used is deskriptif.Taedapat increase the ability of teachers to plan lessons learned from the first cycle is 2,67 with category of "enough" and then on the second cycle with a value of 3.35 with the "good" category. of s ", then on the second cycle with a value of 3.35 with the" good "category. To implement the learning phase occurs also an increase from the first cycle with average scores of 2.87 with enough categories and increased in the second cycle with an average score of 3.65 "good" category. There is an increase in learning outcomes at baseline 65.71 with the percentage of completeness 72% the first cycle, then increased significantly by an average of 78.51 percentage completeness 98% in the second cycle. The average value of the first cycle to the second cycle 72.11 with both categories