This paper will shed light on how Thailand, which is a key player in ASEAN should reposition itself to the English language and education needs of AEC 2015. I will provide a brief overview ASEAN 2015 and examine the current status of English language teaching in Thailand before considering the role of English in education. I will introduce the concept of English as a Lingua Franca (ELF) and point out the differences between the time honored tradition of  using English as a Foreign Language (EFL) and English as a Lingua Franca (ELF) before calling for an overhaul of policies, methods, materials and testing which are essential for the nation’s success in ASEAN.