THE EFFECTIVENESS EXPERIMENTAL METHOD USING PRAKTIKUM ALTERNATIF SEDERHANA (PAS) TO INCREASE STUDENT ACHIEVEMENT AND STUDENT CHARACTER IN LEARNING COLLOIDAL SENIOR HIGH SCHOOL 2 MEDAN CLASS XI ACADEMIC YEAR 2014/2015

The objectives of this research are to get the comparison betweenexperimental method using PAS and experiment with direct instruction to increasestudent`s achievement, and student`s character. Beside of that, this research alsoconducted to know the correlation between student`s achievement and student`scharacter. This research was done in SMA N 2 Medan. Population is all thestudents in SMA N 2 Medan which taken by purposive random sampling. Theresearch instruments are achievement test and non test in character form. Both ofinstruments have been validated. The research data analyzed by SPSS -16 forwindows and Microsoft Excell. The result data shows that (1) The student`sachievement taught by experimental method using PAS give higher significancedifference than experiment with direct instruction. It can be seen from the averageof gain and also proved with t-test, the normalized gain in experimental class is(0.72±0.15) and control class (0.48±0.18) at significant level α = 0.05, Ha isreceived and Ho is refused where Sig. < α (0.000 < 0.05), (2) The student`scharacter taught by experimental method using PAS have increasing value inevery meeting. It can be seen from the average value in student activity haveaverage 61.11% in first meeting, 85.83% in second meeting, and 86.38% in thirdmeeting. Then, student teamwork have average value 73.88% in first meeting,90.55% in second meeting, and 91.11% in third meeting.