The studies presented in this book argue that exploring the grammatical system outside the communicative flow enables students to develop clearer knowledge of this system and to become more effective in their language use. This approach is the outcome of research revolving around the role of metalinguistic knowledge in learning how to write. According to this research, language use and metalinguistic activity are interdependent. The international debate on the effect of grammar instruction on writing skills has been dominated by an overly causal approach which ignores core considerations such as the teaching procedures that we use to reflect upon the grammar system in the classroom and the way we conceptualise this system. This book highlights the need to encourage students to engage in metalinguistic activity, in which verbalisation and data manipulation should play a key role. It also emphasises the importance of conceptualising the grammar system as an organic entity resulting from the integration of form, meaning and the intention of the speaker.