THE EFFECTIVENESS OF USING PORTFOLIO ASSESSMENT TO IMPROVE STUDENTS’ LEARNING ACHIEVEMENT AT THE SEVENTH GRADE STUDENTS OF SMP PGRI BULUSPESANTREN IN THE ACADEMIC YEAR OF 2012/2013

Abstract

This research is quantitative research by using experimental method. The objective of the research is to find out whether assessing method using Portfolio Assessment is effective or not to improve students’ learning achievement at the seventh grade students of SMP PGRI Buluspesantren in the academic year 2012/2013. The population of the research was the tenth grade students of SMP PGRI Buluspesantren by taking the sample from the two classes. The first class was VII C which consisted of 30 students as control group. The second class was VII B which consisted of 30 students as experimental group. This research used the purposive sampling. In short, the use of portfolio assessment is effective. It could be proven by the computation of the t-test. The computation showed that the t-value was higher than t-table. The t-value was 4.586; also, the t-table which used 5% (0.05) alpha level significance was 1.9990. It meant that 4.586>20017. Besides, the mean score of experimental group was raised after given the treatment from 61.26 to 71.13. Hence, assessing method using portfolio assessment is effective to improve the students’ learning achievement.

Keywords: Effectiveness, Assessment, Portfolio Assessment