These books teach students how to diagram sentences so they see the underlying structure of English grammar. Diagramming sentences gives many visual and logical learners an alternative way to learn grammar. Students who understand the finer points of English grammar will apply this knowledge to their writing. For many students, boring old grammar lessons become understandable and fun—even kids who are traditionally more "math minded" begin to enjoy English lessons.

The diagramming begins with simple subject-verb sentences, but continues step-by-step to complex sentences with dependent clauses. Each lesson provides plenty of practice diagramming. After completing all the lessons, there is a review where students diagram sentences using all the grammar rules they have learned.

The grammar lessons in Sentence Diagramming: Beginning are:

• Simple Subject and Main Verb
• Direct Object
• Adjectives
• Adverbs Modifying Verbs
• Predicate Adjectives
• Predicate Nouns
• Prepositional Phrases (Adjectival)
• Prepositional Phrases (Adverbial)
• Compound Subjects
• Compound Predicates
• Compound Direct Objects
• Compound Predicate Adjectives and Nouns

The grammar lessons in Sentence Diagramming: Level 1 are:

• Compound Predicates With Direct Objects
• Imperative Sentence (Commands)
• Interrogative Sentences (Questions)
• Indirect Object
• Adverbial Nouns
• Interjections and Direct Address
• Intensifiers and Adverbs Modifying Adjectives, Adverbs, and Adverbial Nouns
• Linking Verbs and Predicate Adjectives
• Appositives
• Correlative Conjunctions
• Prepositional Phrases
• Compound Sentences

The grammar lessons in Sentence Diagramming: Level 2 are:

• Appositive Phrases
• Objective Complement
• Gerunds and Gerund Phrases
• Participles
• Participial Phrases
• Infinitive Used as Nouns
• Infinitive Phrases
• Noun Clauses
• Adjective Clauses
• Adverbial Clauses
• Comparisons
• Compound-Complex Sentences