This fun, highly-effective 216-page book teaches students in Grades 9-12 grammar, punctuation, spelling, capitalization, and critical reading in a standards-based thinking approach instead of the usual drill and practice found in competing products. Students begin with an easy-to-understand lesson followed by an activity that require students to carefully analyze and edit stories, letters, or articles that contain mechanical errors. This effective method allows students to gain mastery over concepts that will translate into their own writing. Editor in Chief® Level 3 includes lessons and practice with the following concepts: Capitalization, Apostrophes, Colons, Comma, Exclamation Marks, Hyphens, Question Marks, Quotation Marks, Parenthesis, Periods, Semicolons, Adjectives, Adverbs, Agreement, Articles, Clauses, Homophones, Homographs, Interjections, Nouns, Phrases, Preposition, Pronouns, Run-On Sentences, Sentence Fragments, Verbs, Confused Word Pairs, and Spelling.