THE EFFECTIVENESS OF DISCOVERY LEARNING MODEL INTEGRATED WITH EXPERIMENT TO INCREASE STUDENTS ACHIEVEMENT ON LEARNING COLLOIDAL SYSTEM

The objectives of this research are to get the comparison between discovery learning model integrated with experiment and without experiment to increase student`s achievement, and student`s interest. Beside of that, this research also conducted to know the correlation between student`s achievement and student`s interest. This research was done in SMA N 2 Lintongnihuta. Population is all the students in SMA N 2 Lintongnihuta which taken by purposive random sampling. The research instruments are achievement test and non test in list interest form. Both of instruments have been validated. The research data analyzed by SPSS -17 for windows. The result data shows that (1) The student`s achievement taught by discovery learning model integrated with experiment give higher significance difference than discovery learning model without experiment. It can be seen from the average of gain and also proved with t-test, the normalized gain in 1st experimental class is (0.73±0.15) and 2nd experimental class (0.55±0.18) at significant level α = 0.05, Ha1 is received and Ho1 is refused where Sig. < α (0.000 < 0.05), (2) The student`s interest taught by discovery learning model integrated with experiment give higher significance difference than discovery learning model without experiment. It can be seen from the average of interest and also proved with t-test, the average in 1st experimental class is (83.86) and 2nd experimental class (66.01) at significant level α = 0.05, Ha2 is received and Ho2 is refused where Sig. < α (0.000 < 0.05), (3) There is correlation between two variables that are student`s achievement and student`s interest at significant level α = 0.05, Ha3 is received and Ho3 is refused where Sig. < α (0.000 < 0.05), with Pearson correlation (r) = 0.637, it means categorized in high correlation.