One of a series of guides to the teaching of writing at the elementary and secondary levels, this publication suggests activities to use in teaching the three stages of the composition process: prewriting, writing, and postwriting. The first four sections discuss the steps involved in the three stages of composition, research findings on the composing process, and pertinent student needs and instructional goals. The fifth section describes learning activities for the prewriting stage (including activities for motivation, listening, observation, and gathering and organizing materials), for the writing or composing stage, and for editing and proofreading. The final section suggests specific writing activities for use in the content areas of science, social studies, mathematics, English, fine arts, home economics, and business. The publication concludes with lists of suggested teacher resources. (GT)