EFFECT OF PBL USING MOLYMOD MADE OF PLASTICINE TOWARDS STUDENTS’ ACHIEVEMENT IN THE HYDROCARBON TOPIC

Problem based learning methodology using molymod made of plasticine as media was conducted to knowing the improvement of senior high school students‟achievement in hydrocarbon topic in experimental class and control class that taught with direct instruction model in SMA Negeri 16 Medan. The samples were divided into two class based on purposive sampling technique. The kind of this research is experimental research. First, pretest was given to both of class. In experimental class was taught by problem based learning using molymod made of plasticine and in control class was taught by direct instruction model using molymod made of plasticine. The last, post test was given to each class. The hypothesis is tested by using t -test and obtained that tcount is higher than ttable, so that Ha was accepted and there were significant difference of students‟ achievement taught by problem based learning using molymod made of plasticine which were higher than direct instructional model.