Muhammad Fadli

Teacher Professionalism and English Learning Achievement

Introduction

Teacher professionalism and english learning achievement. This study reveals certified English teachers significantly boost students' English learning achievement in vocational high schools, highlighting the positive impact of professionalism.

Abstract

This study investigates the effect of teacher certification on students’ English learning achievement in a vocational high school context. The research employed a causal-comparative quantitative design involving 80 students divided equally into two groups: those taught by certified English teachers and those taught by non-certified teachers. Data were collected through achievement tests and analyzed using descriptive statistics, normality and homogeneity tests, and an independent samples t-test. The results revealed a significant difference between the two groups (t(78) = 1.988, p = 0.025, one-tailed), indicating that students taught by certified teachers achieved higher mean scores (M = 60.50) than those taught by non-certified teachers (M = 53.70). The effect size (Cohen’s d = 0.45) suggests a moderate but educationally meaningful impact of certification on learning outcomes. The findings confirm that teacher certification contributes positively to students’ English achievement by enhancing teachers’ pedagogical competence, professional conduct, and instructional effectiveness. However, the influence of certification is context-dependent and moderated by factors such as teaching practices, institutional support, and the quality of professional development. It is therefore concluded that teacher certification should not be viewed as an endpoint but as a continuous process of professional learning that sustains teaching quality and fosters students’ academic success.

Review

This study offers a valuable quantitative investigation into the relationship between teacher certification and English learning achievement within a vocational high school context. By employing a causal-comparative design, the research effectively addresses a pertinent question regarding the impact of teacher professionalism on student outcomes. The authors' clear objective to investigate the effect of teacher certification is well-matched by their methodological approach, providing empirical evidence that contributes to the ongoing discourse on teacher quality and its role in educational success. Methodologically, the study is sound, involving a reasonably sized sample of 80 students meticulously divided into two equal groups based on their teachers' certification status. The use of achievement tests for data collection, coupled with a robust statistical analysis pipeline including descriptive statistics, normality, homogeneity tests, and an independent samples t-test, lends credibility to the findings. The reported significant difference (t(78) = 1.988, p = 0.025, one-tailed) clearly indicates that students taught by certified teachers achieved notably higher mean scores (M = 60.50) compared to those taught by non-certified teachers (M = 53.70). Furthermore, the inclusion of Cohen's d (0.45) provides an important effect size measure, signifying a moderate and educationally meaningful impact, which strengthens the practical implications of the results. While the study effectively establishes a positive link between teacher certification and student achievement, the abstract commendably acknowledges the complexity of this relationship. The findings rightly suggest that certification enhances pedagogical competence, professional conduct, and instructional effectiveness, but the authors also wisely caution that its influence is context-dependent and moderated by factors such as teaching practices, institutional support, and the quality of professional development. This nuance is crucial, shifting the perspective from certification as a simple endpoint to viewing it as a continuous process of professional learning. Future research could build upon this by exploring the specific mechanisms through which certification translates into improved teaching practices and by investigating these moderating factors in greater detail, perhaps through mixed-methods designs. Overall, this study makes a solid contribution to the literature, affirming the importance of teacher certification while also providing a balanced outlook on its multifaceted impact.

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