In this course, we will engage with the global spread of English and the main forces behind the rise of English to a world language, focusing on the impact of these developments on the acquisition and use of English today. We will cover major historical, linguistic and socio-political factors accounting for (ongoing) changes in the English language as well as exploring current debates in the teaching and learning of global Englishes. In the 21st century, teaching English has become essentially different from teaching any other language, given that English has taken on a life of its own in almost every corner of the world. In addition to global perspectives on users and uses of English, we will also discuss how English functions to express local culture and identity in the new varieties of English. Our discussion of English as a global language will be based on corpus data drawn from the International Corpus of English (ICE) and various English as a lingua franca (ELF) corpora.