“While a focus on grammar as a linguistic resource puts a more positive face on the role of grammar in writing instruction, any discussion of this role should include attention to learners’ writing errors, a significant concern for most L2 writing teachers and their students. For decades, studies and debates on the effectiveness of differing types of error correction and, indeed, of error correction at all, have been a major topic in the L2 writing literature. Central in recent debates include the exchanges between Truscott (1996,2007), who believes that ESL research does not provide evidence showing that error correction improves writers’ accuracy over time, and Ferris (1999,2011), who, while acknowledging that research base lacks controlled studies on this topic, nevertheless asserts that studies have indicated short-term improvement. Ferris (2011) has further pointed out that without attention to errors and explicit instruction, adult learners may fail to make progress in correcting patterns of errors in their L2 writing. Indeed, writing teachers in higher education contexts have found out that many of their multilingual students enter colleges and universities unaware of frequent error patterns in their writing”.