การประยุกต์ใช้แนวคิด 3 ระดับร่วมกับการสอนแบบอีไอเอ็มเอเพื่อพัฒนาการอธิบายทางวิทยาศาสตร์ เรื่อง สารบริสุทธิ์ของนักเรียนชั้นมัธยมศึกษาตอนต้น

Abstract

This study measured the effectiveness of the Three levels of thinking and EIMA instructional method on the conceptual understanding of pure substances among Thai 7th graders. Baseline and post-instructional assessments were designed to measure the quality of students’ scientific explanations of physical phenomena, and a rubric was used to score open-ended responses. Data were analyzed using normal distribution statistical methods including paired samples t-test. In the baseline assessment, 45.93% of students responses were rated at level 1 (low level); 32.84% of student responses were rated at level 2 (intermediate); and 21.22% of students responses were rated at level 3 (advanced level). The post-instructional assessment showed gains in higherorder student understanding, with 15.96% of student responses rated at level 1; 56.53% of responses rated at level 2; and 27.51% of responses rated at level 3. The results of this study suggest that the use of the TLT/EIMA instructional method effectively increases the quality of 7th-grade students' explanations of pure substances. From this, it can be inferred that students' conceptual understandings of pure substances were improved as well.