Write Source^® is a student-friendly, comprehensive writing program for Grades 1–12 with research-based instruction to help students become better writers, thinkers, and learners. The program uses a clear, logical sequence of instruction to support students through all stages of the writing process. With Write Source, students develop effective writing skills that will last a lifetime…from the classroom to the boardroom. Let HMH help your child to begin that journey today. Write Source® is a registered trademark of Houghton Mifflin Harcourt Publishing Company.