Building English skills - Writing Improvement Project (Evanston, Illinois McDougal, Littell & Company, 1977)
Book 1. [Grade 7] Red level -- Book 2. [Grade 8] Green level -- Book 3. [Grade 9] Orange level -- Book 4. [Grade 10] Blue level -- Book 5. [Grade 11] Yellow level -- Book 6. [Grade 12] Purple level.
Includes index.
Keywords: English language -- Grammar; English language -- Composition and exercises; English language -- Grammar -- Problems, exercises, etc