Jadavpur Journal Of Languages and Linguistics, Volume 02, Number 01, pp. 63-78 Journal Homepage: http://jjll.jdvu.ac.in/journal/index.php/JJLL Jadavpur Journal of Languages and Linguistics Achieving Cohesion through Grammatical Conjunctions in Selected English as a Second Language (ESL) English Language and Mathematics Classroom Discourses Akinseye Tolulope Adeoluwa University of Ibadan, Nigeria A R T I C L E I N F O Article history: Received 8/09/2018 Received (revised form) NA Accepted 10/12/2018 Keywords: classroom discourse; grammatical conjunctions; enhancing; elaborating; extending A B S T R A C T This paper examines how grammatical conjunctions are linguistically represented and categorised as a form of discourse system in ESL English Language and Mathematics classroom discourses. Using the linguistic categorization of the system of conjunction by Halliday and Matthiessen (2004), the study analysed the discourses as a system of linguistic components which are systematically connected by conjunctive elements. The analysis from the selected discourses in Ibadan revealed the way concepts, ideas in the subject contents in the discourses are consistently linked by means of elaborating ( appositive), extending (additive, adversative and varying) and enhancing (spacio- temporal and causal-conditional) conjunctions. The overall results showed the highest rate of enhancing conjunctions in creating cohesion in both discourses. Although it was apparently higher in mathematics classes than in English Language classes, followed by extending conjunctions and elaborating conjunctions, respectively. Also, the selected discourses revealed the teachers‟ preference for certain conjunctive devices in the discourses than some other. 1. Introduction Classroom discourse involves the study of spoken language in the classroom, with the ultimate goal of finding meanings to different forms and patterns of language between the teacher and the students in the course of teaching and learning. The aim of the discourse which is specifically interpreted as a system of meaning beyond grammar and lexis is also interested in the understanding of the mechanisms of structuring a text. Cohesion in discourse, therefore, is an important linguistic feature in the discourse that produces texture (the basis which accounts for the unity and semantic interdependence within the discourse) among the clauses in the text. The system of cohesion which was introduced by Halliday and Hasan (1976) suggests the relations of meaning that exist within a text; a sequence where there is a relationship between one clause and the other in the same discourse. It is the interpretation of the dependency and the independency of some elements (grammatical or lexical) in the same discourse. Cohesion in English as a second language (ESL) texts or discourses is geared towards unfolding how ESL users construct discourses. The analysis of grammatical