This book investigates the effects of corpus work on the processof foreign language learning in ESP settings. It suggests thatobserving learners at work with corpus data can stimulatediscussion and re-thinking of the pedagogical implications of boththeoretical and empirical aspects of corpus linguistics. The ideaspresented here are developed from the Data-Driven Learningapproach introduced by Tim Johns in the early nineties. Theexperience of watching students perform corpus analysis providesthe basis for two main observations in the book: a) corpus workprovides students with a useful source of information aboutESP language features, b) the process of “search-and-discovery”implied in the method of corpus analysis may facilitate languagelearning and promote autonomy in learning language use. Thediscussion is carried out on the basis of a series of corpus-basedinvestigations by students and provide suggestions for developingnew tasks and tools for language learners.