Every year that I share this book, my students love it. It starts with a student starting his day and his teacher tells him this:
Everything does become a math problem.
My students laugh at all of the problems and then have an "ah-ha" moment when the student manages to stop the problems. (Which is where the fractions come in.)
I normally share this book with my class as a read-aloud, and then put it at a center for the students to attempt to solve some of the problems that are found in the book. the back cover has the answer key.
My students love the playfulness of the book.
What's your favorite fraction mentor text to use with your students?