Writing is a complex skill that requires the integration of cognitive, memory, linguistic, motor, and affective systems. It is difficult to teach because students must learn how to juggle all of these systems simultaneously. The writing process includes pre-writing, drafting, revising, editing, and publishing. Effective writing instruction models good writing, demonstrates writing strategies, provides practice and feedback, and scaffolds the writing process from simple to more complex tasks. Teaching writing helps students learn how to clearly present and defend their ideas.