Teaching writing is seen as a more challenging job than other communication skills. When teaching writing, teachers always find ways to help students minimize mistakes in vocabulary, grammar or sentence structure. However, it is difficult for teachers to correct all students’ writings, especially for large classes, so it is difficult for all students to receive feedback from teachers for their own writing. To create a habit of self-study and promote self-control in learning to write, the application of the peer - correction method when teaching writing skills is an effective measure.