This volume consists of selected papers from the 2009 meeting of the American Association for Corpus Linguistics. The chapters cover aspects of language use (usage-based accounts of morphology/syntax of English and Tok Pisin), language learning (corpus-based learning of English, syntactic development observable in a Learner Corpus of English, "core" vocabulary items for learners of English) and language documentation (a new and innovative usage-based frequency dictionary of English, proposals to broaden the traditional understanding of a corpus in various directions, e.g., constructing a corpus of the content of Japanese manga comics). Taken together, the thirteen chapters represent a good cross-section of strands of new work in corpus linguistics, as practised by international scholars working on English and other languages.