The Study and Development of Inquiry-Based Learning Science Activity Set (7E) on the Topic of 'Earth and Change' for the Science Course (SCI22102) in the Science and Technology Learning Area, Grade 2 of Secondary Education.

Abstract

             This research aims to: 1) Determine the effectiveness of the 7E (Engage, Explore, Explain, Elaborate, Evaluate, Extend, and Experience) science learning activity set on the topic of "Earth and Change" in the Science course (Code: ว22102), under the Science and Technology Learning Area, for Grade 2 students in accordance with the set criteria of 80/80. 2) Compare the learning outcomes of Grade 2 students before and after using the learning activities. 3) Examine the overall satisfaction of Grade 2 students towards the learning activities. This quasi-experimental research utilized a one-group pretest-posttest design with a sample group of Grade 2/2 students in the second semester of the 2025 academic year at Nakhon Phanom Witthayakom School, located in Mueang District, Nakhon Phanom Province, affiliated with the Educational Service Area Office of Nakhon Phanom. The sample size was 36 students, selected through simple random sampling using classrooms as the criterion. The research tools included: 1) 11 sets of the 7E science learning activity set on the topic of "Earth and Change," 2) 22 hours of the guided inquiry learning plan (7E) on the topic of "Earth and Change," 3) a pretest-posttest science learning achievement test on the topic of "Earth and Change" with 40 items, and 4) a satisfaction questionnaire regarding the learning activities with 15 items. Data analysis involved calculating efficiency (E1/E2), mean values ( ), percentages (%), standard deviation (S.D.), and comparing score differences using the t-test.
          The research findings indicate that: 1) The 7E science learning activity set on the topic of "Earth and Change" in the Science course (V22102) for Grade 2 students has an efficiency level of 85.70/85.60, exceeding the set criteria of 80/80. 2) Grade 2 students using the learning activities demonstrated significantly higher science learning outcomes after the intervention compared to before. 3) Overall, Grade 2 students expressed high satisfaction with the learning activities (= 4.57, S.D. = 0.50).