This series focuses on grammar for a purpose - clear, effective writing. Book 1 introduces action and linking verbs, verb tenses, irregular verbs, singular and plural, common and proper nouns, subjects, pronouns, possessives, contractions, objects, prepositions, adjectives, adverbs, modifiers, and types of sentences. Book 2 reviews Book 1 material and also introduces sentence fragments, agreement, appositives, comparatives, homophones, articles, good vs. well, compound sentences, phrases, and sentence diagramming. Writing exercises give the student a chance to use his new knowledge. Book 3 includes brief review of the material, but mainly concentrates on using the concepts to write effectively. Review sections cover several units so that many concepts can be reinforced at the same time. A final review will tell you if the student has mastered the material.