EFEKTIVITAS MODEL PEMBELAJARAN BERBASIS MASALAH TERHADAP HASIL BELAJAR ARITMATIKA SOSIAL SISWA SMP NEGERI 1 SIGI

This study aims to determine the effectiveness of
implementing the Problem Based Learning (PBL) model on
student learning outcomes in the Social Arithmetic subject
at Sigi State Junior High School 1. This study uses a
quantitative approach with a quasi-experimental method and
a nonequivalent control group design. The research sample
consisted of two classes: an experimental class that used the
PBL model and a control class that used direct instruction.
The research instruments consisted of essay tests (pretest
and posttest) that had been validated by experts. Data
analysis was conducted using descriptive and inferential
statistics, including normality tests, homogeneity tests,
independent t-tests, and N-Gain calculations. The results
showed that the average posttest score of the experimental
class (81.25) was higher than that of the control class
(32.16). The hypothesis test results indicated a significance
value of 0.001 < 0.05, meaning there was a significant
difference between the two groups. Furthermore, the N-Gain
value for the experimental class was 0.78 (high category),
while that for the control class was 0.20 (low category). This
indicates that the Problem Based Learning (PBL) model is
more effective in improving student learning outcomes than
direct instruction. Thus, the PBL model has been proven
effective in enhancing students’ understanding and learning
outcomes in Social Arithmetic