THE EFFECTIVENESS OF PROBLEM-BASED LEARNING ON ENGLISH WRITING PROFICIENCY AT 7TH GRADE SMP NEGERI 1 KEJOBONG PURBALINGGA

Ali, Iqbal Subarkah (2025) THE EFFECTIVENESS OF PROBLEM-BASED LEARNING ON ENGLISH WRITING PROFICIENCY AT 7TH GRADE SMP NEGERI 1 KEJOBONG PURBALINGGA. Skripsi thesis, UIN Prof. K. H. Saifuddin Zuhri.

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Abstract

This study aimed to examine the effectiveness of Problem-Based Learning (PBL) in improving English writing proficiency among 7th-grade students at SMP Negeri 1 Kejobong. Employing a quasi-experimental design, the research involved two groups: an experimental group taught using PBL and a control group taught through conventional methods. Writing proficiency was measured through pre-tests and post-tests, focusing on three key indicators: content quality, organization, vocabulary usage, grammatical correctness, and mechanics. The results showed that the experimental group experienced a notable improvement, with the average post-test score increasing from 45.29 to 62.68. In comparison, the control group showed minimal change, with the average post-test score rising only slightly from 40.30 to 40.56. The normalized gain (N-Gain) analysis revealed a score of 0.30 for the experimental group and -0.07 for the control group. According to N-Gain classification, the result is categorized as not effective. However, the experimental group demonstrated greater progress in terms of writing quality, particularly in content development and vocabulary use, compared to the control group. Although the PBL implementation did not meet the minimum effectiveness threshold, it contributed positively to students’ engagement and writing improvement. These findings suggest that Problem-Based Learning holds potential as an alternative instructional approach for teaching writing. Future applications of PBL are recommended to include longer treatment durations and additional scaffolding to enhance its overall effectiveness.

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