A solid command of English grammar is a prerequisite for success when students take the SAT, ACT, and other college entrance tests. This workbook presents a detailed grammar review with plenty of practice quizzes and exercises to sharpen students' skills. It opens with a summary of grammatical terms with explanations of their functions. The 24 most common mistakes made by students are pointed out with demonstrations of how to correct them. Most prominent among the mistakes include subject-verb agreement, divergence from parallel structure, and faulty punctuation. This workbook is filled with sample questions resembling those found on both the SAT and ACT, and comes with fully explained answers.