This essay explains to students that reflective writing involves their thinking about their own thinking. They may be asked to reflect about their audience and purpose for a piece of writing. They may write about their invention, drafting, revision, and editing processes. They may self-assess or evaluate their writing, learning, and development as writers. These activities help cement learning. They also help writers gain more insight into and control over composing and revising processes by helping them gain critical distance and by providing a mechanism for them to do the re-thinking and re-seeing that effective revision requires. The article gives examples of student reflective writing, explains how they function in a student’s learning, and gives scholarly support for why these kinds of activities are effective.