Kumon D1 Answer Book English -

While not a direct substitute, workbooks like Grammar for Middle School or The Blue Book of Grammar and Punctuation cover the exact same concepts (clauses, conjunctions, semicolons). Mastery of these will allow a student to answer D1 worksheets correctly without a key.

The "D1" designation refers to the . It typically contains 200 worksheets, each designed to take 10–15 minutes to complete. Kumon D1 Answer Book English