211 © he Editor(s) (if applicable) and he Author(s) 2016 K.P. Corrigan, A. Mearns (eds.), Creating and Digitizing Language Corpora, DOI 10.1057/978-1-137-38645-8_8 8 Language Learning at Your Fingertips: Deploying Corpora in Mobile Teaching Apps Seth Mehl, Sean Wallis, and Bas Aarts 1 Introduction Since 2009, the Survey of English Usage (SEU) at University College London has developed a series of knowledge transfer and pedagogical innovation projects for teaching English linguistics to a broad audience. he results of these projects include three language-learning mobile apps: the interactive Grammar of English (iGE; Aarts and Wallis 2011), Academic Writing in English (AWE; Mehl et al. 2013), and English Spelling and Punctuation (ESP; Wallis et al. 2014). 1 In this chapter, we begin by briely summarizing the history of language teaching, represent- ing the context into which these language teaching apps were introduced. 1 he three apps can be accessed online via the Survey of English Usage: http://www.ucl.ac.uk/ english-usage/apps. S. Mehl ( University College London, London, UK AWE and ESP were funded by a UCL Teaching Innovation Grant, and iGE was developed as a Teaching and Learning (AH/H015787/1) and Extending the Englicious Platform for Primary English (AH/L004550/1). We gratefully acknowledge this support. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Page 231 A fourth app, Grammar Practice for KS2 (GP-KS2), is also available.