pedagogical approaches to lexical bundles: enhancing iranian efl learners’ argumentative writing

The importance of learning lexical bundles for enhancing language proficiency is gaining increasing interest in the field of foreign language learning. lexical bundles, commonly understood as recurrent word sequences in discourse, are crucial for developing fluency and comprehension across various linguistic domains. this quasi-experimental research was conducted at danesh language institute, university of zabol, enrolling 53 upper-intermediate-level students divided into experimental and control groups through convenience sampling. the experimental group received focused instruction integrating the identification and use of lexical bundles into their standard curriculum, while the control group received regular instruction. pre-test and post-test assessments were administered to evaluate changes in vocabulary range and grammatical accuracy in argumentative writing. the results indicated that the learners in experimental group showed marked improvements compared to the control group. implications include integrating lexical bundle-focused strategies into curricula to support learners’ transition to advanced proficiency, with future research recommended to explore long-term effects and broader applications.