THE APPLICATION OF COOPERATIVE LEARNING ROUND ROBIN TO IMPROVES STUDENT LEARNINGACHIEVEMENT ON THE SUBJECT OF ELECTROLYTE-NONELECTROLYTEAND REDOXIN CLASS X SMAN 1 SEBERIDA

Research onthe application of cooperative learning model Round Robin has been conducted to improve student learning achievement on the topic electrolyte- nonelectrolyte and redox at class XSMAN 1 Seberida. This research is experimental research with randomized control group pretest-posttest design. The sample took in the 10 Maret – 24 April 2013. The sample consisted of two classes, X3 classas experimental classandX1classas control class. Experimental class is a class that is used cooperative learning model Round Robin, while the control class was not. Data analysis technique used is the t-test. Based on analysis of data obtained tarithmetic>ttableis 3.43 > 1.67, means that the cooperative learning model Round Robin can improve student achievement on the subject of reaction rate in class X SMAN 1 Seberida where the effect of an increase is 15.96