the companion workbook to Grammar Dimensions 3: Form, Meaning, and Use, Platinum Edition. It provides extensive practice activities that reinforce the grammar presented in the Student’s Book, helping learners master advanced grammar structures through a balance of form, meaning, and communicative use. The workbook includes grammar drills, editing tasks to improve writing accuracy, review exercises, and TOEFL-style practice to strengthen test-taking skills. Suitable for upper-intermediate to advanced ESL/EFL learners (approximately CEFR B2–C1), it is ideal for classroom use, homework, or independent study alongside the main course.