AbstrackThe purpose of this research was to know the effect of cooperative learning model of Student Teams Achievment Division (STAD) type based toward achievement on the electrolite and non electrolite solutions material. The population of this research was from all students of class X at SMK Negeri 2 Pontianak 2016/2017 school year. As a sample, the researcher used class X TEI B (Industrial Electronics Engineering B) as the control class and class X TPPPP (Broadcasting of Television Program Production Techniques) as the experiment class. This research used quasy experimental design. The sample was taken by random sampling technique. The research finding showed there were the differences between the students'achievement in experiment class with the students' achievement in the control class in which the average score of experimental class posttest was 59.00 and the average score of control class posttest was 42.68. The effect cooperative learning model STAD type based constibute about 35.7% toward the achievement of the electrolite and non electrolite solutions material of class X at SMK Negeri 2 Pontianak.