Language includes four skills and writing is the most difficult skill for L2 learners to master. Writing is a process through which a writer tries to communicate ideas and thoughts. Not only for second or foreign language writers but also for native language writers, writing needs special instruction. In writing, grammatical accuracy is vital since it causes the writer to transfer intended ideas and to avoid communicative misunderstanding (Lush, 2002). Assessing the achievement of every student is a necessary part of class activities, especially writing that presents a challenge for teachers and learners throughout the classroom period. Considering assessment for learning in the classroom, Fulcher (2010) states, "activities should focus upon making the learner aware of the gap between current abilities and performance levels, and the target or goal that the learner wishes to achieve" (p.72).