This article examines a grade one teacher's support for her students' writing development through formal peer and teacher feedback. The teacher modelled and provided examples of effective feedback and good writing in whole-class and small-group lessons and in her own one-on-one verbal feedback on student writing. She allocated time for the students to participate in formal peer-feedback sessions, in turn giving feedback to the students on the suggestions to one another during these sessions. Students gave more content-oriented than conventions-oriented feedback to each other. They revised the content and writing conventions of their writing in response to 90% of the feedback they received from their peers and teacher.