This book is for students that want to know the parts of speech well. The author uses diagramming sentences to help the student to recognize the part of speech and know how to use it in the sentence. The book is designed to simply read the lesson and do the accompanying exercise by simply in the answers in the book.
This is a fantastic way to learn how English grammar works. I bought and used these books for grade seven English classes.
Through the lens of a sentence structure, O'Brien's practical exercises and simple explanations are scaffolded so that each new topic builds upon previous lessons. Diagramming and naming the word's function in a chart is the winning combination to make the learning stick.