This study compared the impact of two types of teacher written feedback on Iranian EFL learners' writing ability and their ability of tense consistency in L2 writing.After administering a standardized language proficiency test(Preliminary English Test),62 homogenous participants were assigned to the control(direct-only correction)and experimental(direct metalinguistic correction) group.The comparison of the groups on the writing pretest confirmed the homogeneity of the subjects before the instruction.During 10 sessions of instruction, the control group received direct-only correction by...