Discusses ways of achieving productive use of authentic language in a computer-assisted language learning (CALL) environment. Concentrates on a particular area of CALL--parser-based CALL. Outlines two existing parsers for two CALL tools that support text production by encouraging learners to concentrate on the linguistic structure of a text produced in a communicative task to provide evidence for the contribution language processing techniques can make to the field of CALL. (Author/VWL)