การพัฒนากิจกรรมการเรียนรู้แบบโครงงานเป็นฐาน (PjBL) เพื่อยกระดับความสามารถในการคิดแก้ปัญหาทางเคมี และผลสัมฤทธิ์ทางการเรียนของนักเรียนชั้นมัธยมศึกษาปีที่ 5
Year: 2026
Type: article
Study design: Clinical Trial
Abstract: This study aimed to 1) develop and evaluate the efficiency of project-based learning (PjBL) activities on the topic of Chemistry and Problem Solving based on the 75/75 criterion, 2) compare students’ chemical problem-solving ability with the 75 percent criterion, and 3) compare students’ learning achievement with the 75 percent criterion. The study employed a One-Group Posttest-Only Design. The sample consisted of 19 Grade 11 students enrolled in the second semester of the 2025 academic year and selected through cluster random sampling. The research instruments included: 1) project-based learning lesson plans, 2) a chemical problem-solving ability test with a reliability coefficient of 0.70, and 3) a learning achievement test with a reliability coefficient of 0.82. Data were analyzed using mean, standard deviation, percentage, and one-sample t-test. The findings revealed that: 1) the efficiency of the project-based learning activities was 87.58/79.82, which exceeded the established 75/75 criterion; 2) students’ average chemical problem-solving ability was slightly higher than the 75 percent criterion, although no statistically significant difference was found at the .05 level; and 3) students’ learning achievement was significantly higher than the 75 percent criterion at the .05 level.
Institution: Roi et Rajabhat University
Language: Thai
Subfield: Education
Field: Social Sciences
Domain: Social Sciences
SDG: Quality education
Open Access status: diamond
OpenAlex ID: W7219353035