English Language Teaching and Linguistics Studies ISSN 2640-9836 (Print) ISSN 2640-9844 (Online) Vol. 2, No. 3, 2020 www.scholink.org/ojs/index.php/eltls 32 Original Paper Development of English Communication Competence of Learners in Educational Institutes in Nakhon Ratchasima Province for Joining AEC Thawascha Dechsubha 1* 1 Shinnawatra University, Faculty of Liberal Arts, Pathum Thani, Thailand * Thawascha Dechsubha, Shinnawatra University, Faculty of Liberal Arts, Pathum Thani, Thailand Received: July 22, 2020 Accepted: August 15, 2020 Online Published: August 19, 2020 doi:10.22158/eltls.v2n3p32 URL: http://dx.doi.org/10.22158/eltls.v2n3p32 Abstract This research interpreted data from 4 research topics 1) Development of a New Method of English Instruction for Higher Secondary School Learners for Joining AEC, 2) Development of Basic English Communication for Occupational Progress of Non-Formal Education Learners in Nakhon Ratchasima Province, 3) Development of English Competence for Communication of higher Secondary School Learners in Nakhon Ratchasima Province for Joining AEC and 4)Development of English Skills of Tertiary Level Learners in Nakhon Ratchasima Province for Jobs and Occupational Opportunity. The purposes of this study were to (1) study ability of English speaking for communication of higher secondary school learners from Boonluawithayanusorn, and Baanluamwithayakhom higher secondary schools for joining AEC, (2) compare ability of English speaking for communication of higher secondary school learners from Boonluawithayanusorn and Baanluamwithayakhom higher secondary school for joining AEC for joining AEC, (3) study basic English speaking ability for occupational progress of non-formal education learners, (4) compare basic English speaking ability for occupational progress of non-formal education learners, (5) study the English speaking skill of the tertiary level learners in Nakhon Ratchasima in order to add up a chance of jobs and occupation and (6) compare the English speaking ability of the tertiary level learners in Nakhon Ratchasima in order to add up a chance of jobs and occupation. The population in this study consisted of 290 learners from higher secondary schools, from non-formal education department, and tertiary level who took English course during the second semester of the academic year 2015. Samples consisted of 140 learners from higher secondary schools, non-formal education department, and tertiary level who took English course during the second semester of the