This book is fantastic for first grade. The teacher can use it to help the students recognize repititious phrases in this book and to look for them in other text that they read. You could also introduce some simple poetry into the lesson to add to the content. I would do this on a separate day from the initial read of the book so the student are not overwhelmed with loads of information. But I would introduce poetry with repetitious phrases the day after the initial read but still read the book again.