ACE WORKBOOK (ACHIEVING COMPETENCE IN ENGLISH GRAMMAR) IN ENHANCING GRAMMAR PROFICIENCY

Grammar proficiency is a fundamental component of effective communication and a critical competence for pre-service teachers who are expected to model accurate language use in academic and professional settings. However, many first-year education students enter tertiary education with varying levels of grammatical competence, which may hinder their academic performance and future teaching effectiveness. This study examined the effectiveness of the ACE Workbook (Achieving Competence in English Grammar) in enhancing the grammar proficiency of first-year Bachelor of Secondary Education (BSEd) English major students at West Visayas State University–Calinog Campus during the First Semester of Academic Year 2025–2026. The study employed an experimental one-group pre-test–post-test research design. A total of twenty-seven (27) first-year BSED English majors participated in the study through purposive sampling. Data were gathered using an adopted grammar proficiency test administered before and after a seven-week implementation of the ACE Workbook. Mean and dependent t-test was used to analyze the data. Results revealed that the respondents’ pre-test performance was at an average level, indicating moderate grammar proficiency prior to the intervention. After the implementation of the ACE Workbook, post-test results showed a high level of grammar proficiency. These findings confirm that the ACE Workbook was effective in improving the grammar proficiency of first-year education students. The study concludes that structured, practice-based instructional materials grounded in established language learning theories significantly enhance grammar competence among pre-service teachers. The findings suggest that workbook-based interventions may be effectively integrated into teacher education programs to strengthen foundational English grammar skills and better prepare future educators for academic and professional demands.