THE EFFECTIVENESS OF TEACHING TO INDUCE THE CONCEPTUAL CHANGE (M3PK SIMSON TARIGAN) TO INCREASE STUDENTS ACHIEVEMENT AND CHARACTERS ON TEACHING ACID BASE SOLUTION

The purpose of this research was to determine a difference of students achievement is taught by M3PK Simson Tarigan compared by conventional method. The research was conducted in Senior High School of MAN 2 Model Medan with population were all of students that use the 2013 Curriculum and the sample was randomly selected (random sampling) in MAN 2 Model Medan that consist of two classes, there are experiment and control classes. In the experiment class taught by M3PK Simson Tarigan, while the control class taught by conventional method. The total of instrument test is 30 items number was validated before used to students then there are 24 items number was valid but only 20 items number that chosen as instrument test of research. Data collected by the test that the pretest and posttest and there are observation of students character (responsibility and activeness) through observation sheet that is only done in the experiment class. Data analysis using t-test statistics, students character were analyzed by percentage formula. The data analysis of pretest in experiment class is 17.25 ± 6.17 and posttest is 83 ± 6.16. While the pretest in control class is 18 ± 7.15 and posttest is 73 ± 5.48. Based on the hypothesis test of gain at significant level α = 0.05 showed that is tcalculate > ttable (5.80 > 1.69), it conclude that the students achievement taught by M3PK Simson Tarigan is higher than students achievement taught by conventional method with the percentage of effectiveness is 16.25%. The development of students characters, there are responsibility and activeness that observe in experiment class during twice meetings as much 61.39% for responsibility and 54.03% for activeness.