Using Problem-based Learning to Improve Students' Creative Thinking Skills on Water Purification

The aim of this study is to obtain information about the using Problem-based Learning (PBL) to improve students' creative thinking skills on water purification. The research adopted quasi-experimental method with one group pre-test-post-test design, involving 31students of class XI in one SMK in Cimahi as the subjects of study. The students were divided into three groups categories: high, medium, and low based on the average grades of daily tests. The used instruments in this study were essay, observation sheet, questionnaire (Likert scale), and interview sheet Aspects of creative thinking skills are developed including: fluency, flexibility, originality, detailing (elaborative), and judging (evaluative). To identify the improvement of students' creative thinking skills on water purification, "normalized gain" or < g > of the pre-test and post-test scores was calculated. The results showed that PBL can enhance students' creative thinking skills by means high category (percentage of < g > = 70.12%). This nformation can be used as an input to teachers in the school and teacher education programs.