Problem-Based Learning with Science Writing Heuristic (SWH) for Promoting Scientific Reasoning Ability in Chemistry of Grade 11 Students

Abstract

The purpose of this research were as follows: 1) To develop learning activities based on Problem-Based Learning with Science Writing Heuristic (SWH) in chemistry with a required efficiency of 70/70, 2) To compare the scientific reasoning ability between pre- and post- Problem-Based Learning with Science Writing Heuristic (SWH) and 3) To compare learning achievement with the criteria of 70 %. The sample group of this research was 35 students of Mathayomsuksa 5/7, Currently studying in the first semester of the 2024 academic year at the junior high school in, Roi-Et Province. selected by cluster random sampling technique. The research tools included: 1) 6 lesson plans based on Problem-Based Learning with Science Writing Heuristic (SWH), each lasting 2 hours, for a total of 12 hours. 2) The scientific reasoning ability test and 3) The learning achievement test. The data analysis statistics included means, standard deviation, percentage, One Sample t-test and Dependent-sample t-test for hypothesis testing. The research findings revealed that: 1) The learning activities based on problem-based learning with Science Writing Heuristic (SWH) had efficiency (E1/E2) of 77.92/71.31 2) The scientific reasoning ability post-learning mean score was 24.34, which was significantly higher than the pre-learning mean score of 6.23 at the .05 level of significant. and 3) The learning achievement was 15.00 out of a total of 20 points. which is higher than 70% of the criterion with a statistically significant of .05 level.