This study examined the effect of two types of feedback, post-text as a written feedback and recast as an oral one on written grammatical accuracy of Iranian intermediate EFL learners. To this end, 45 intermediate students who were studying at Ideal Language Institute in Sari were selected based on their performance on the Nelson proficiency test, and then divided into three groups (two experimental and one control groups) randomly. As pretest, the participants were asked to write 150-200 words about the worst memory they had in their life. Then, they were exposed to 10 weeks of treatment. Each week, they received a topic to write. One of the experimental groups received post-text feedback and another one recast. Afterwards, the three groups sat for the posttest. The obtained results were compared using ANCOVA. The findings revealed that there was a significant difference between the post-test scores of the students in different groups. It was made clear that both treatments were effective on the reduction of students grammatical errors in writing, but post-text feedback was much more effective than recast.
