Grounded in John Langan’s Four Bases – unity, coherence, sentence skills, and support – employs a unique personalized learning plan to address student deficits in grammar and mechanics and to free instructional time for activities emphasizing writing process and critical thinking. features John Langan's trademark crystal-clear explanations, along with his range of motivating activities and writing assignments that reinforce the four bases of effective writing. The new edition adds a variety of exciting new features to John Langan's proven approach, and reinstates much-requested material from previous editions.