The Development of Compound Sentence Writing Skill Using Semi-Controlled Writing and STAD Techniques for Grade 9 Students

Abstract

This article aimed to (1) evaluate the effectiveness of a lesson plan using semi-controlled writing technique with the STAD technique to enhance English compound sentences among Mathayom 3/8 students, ensuring it meets the 80/80 efficiency criterion; (2) promote English compound sentence writing skill using semi-controlled writing technique with STAD technique by comparing students’ learning achievement before and after the intervention; and (3) examine students’ satisfaction using semi-controlled writing technique with STAD technique in enhancing the Mathayom 3/8 students. The sample consisted of 36 students from Mathayom 3/8 at Watcharawittaya School in the second semester of 2024 academic year, selected using cluster random sampling. The research instruments included the lesson plans, learning achievement tests (pre-test and post-test), and a student satisfaction questionnaire. Data were analyzed using percentage, mean, standard deviation, E1/E2 efficiency index, and T-test. The results revealed that: 1) The lesson plan using semi-controlled writing technique and STAD technique achieved an efficiency of 79.44 (E1) and 80.09 (E2), meeting the established criteria.  2) The students’ post-test scores were significantly higher than their pre-test scores at the .05 significance level. 3) The students’ overall satisfaction with the learning experience was at the highest level ( = 4.38, S.D. = 0.71). The findings of this study indicate that the STAD technique combined with semi-controlled writing significantly enhances both the academic and social skills of learners. It improves writing abilities and fosters stronger relationships among group members.