Each of the four workbooks provides over 100 exercises on different aspects of English grammar that secondary students have to understand well. Although the workbooks are intended to accompany the Student Book, they can also be used with whatever grammar texts teachers decide to use.   
   

Unit 1 Nouns: Subject, Object, Object of preposition and Complement
Unit 2 Countable and Uncountable Nouns
Unit 3 Singular and Plural Nouns
Unit 4 More Practice with Plurals, Uncountable Nouns and Concrete and Abstract Nouns
Unit 5 The Definite and Indefinite Articles
Unit 6 A/An, The, Some and Any
Unit 7 Personal Pronouns
Unit 8 Indenfinite Pronouns and Determiners
Unit 9 Determiners and Pronouns: Quantifiers and Identifiers
Unit 10 Determiners and Pronouns: Quantifiers and Identifoers
etc.

Anne Seaton is an Oxford graduate and a former senior editor with W & R Chambers of Edinburgh. She has worked extensively on publications for Learners Publishing, including Understanding Spelling and English Grammar for Students.
A graduate of Edinburgh University
Betty Kirkpatrick has had a long and distinguished career as editor, publisher and writer of English reference books. She now writes mainly for Learners Publishing, authoring books that include Thematic Vocabulary 1 and 2, Everyday Idioms and Social Expressions.