The importance of collocations for success in language learning is widely recognized. Concordancers,
originally designed for linguists, are among the most popular tools for students to obtain, organize,
and study collocations derived from corpora. This paper describes the design and development of
a collocation learning system that is built from Wikipedia text and provides language learners with
an easy-to-use interface for looking up collocations of any word that occurs in Wikipedia. The use
of this corpus exposes learners to contemporary, content-related text, and enables them to search for
semantically related words for a given topic. The system organizes collocations by syntactic pattern,
sorts them by frequency, and links them to their original context. The paper includes a practical user
guide to illustrate how to use the system as a language aid to facilitate academic writing.