Enhancing Pronunciation, Fluency, and Vocabulary Through Targeted Instructional Grouping in Latin American EFL Contexts

Abstract

Targeted instructional grouping has emerged as a promising pedagogical strategy for improving specific oral communication skills among English as a Foreign Language (EFL) learners. This study explores the effects of level-based instructional grouping on three essential components of oral proficiency—pronunciation, fluency, and vocabulary—among A1-level learners in a Latin American context. Drawing on eight weeks of structured intervention and informed by previous research on differentiated instruction, ability grouping, and CEFR-aligned speaking development, the study evaluates how grouping students by similar proficiency levels fosters measurable linguistic gains. A mixed-methods design was implemented, including diagnostic pre-tests and post-tests, classroom observations, and student surveys. Results revealed significant improvement in pronunciation and fluency, with moderate but consistent progress in vocabulary. Students reported increased confidence, reduced anxiety, and greater opportunities for oral interaction. Teachers acknowledged improved classroom management and more efficient instructional delivery. The findings suggest that targeted instructional grouping can provide a meaningful and supportive environment for oral-skill development in Latin American EFL settings, particularly when combined with communicative and task-based methodologies.