Little Gray loved his lagoon and the humans who came to visit him there. One day, Mama announces that they must swim north to a far-away sea. At first he is sad to leave his home, but Little Gray soon realizes the importance of their journey.  What happens along the way and how does Little Gray help his mother? Swim along with Little Gray as he finds the way to this special, food-filled sea. This fictional story includes a 4-page For Creative Minds section in the back of the book and a 39-page cross-curricular Teaching Activity Guide online. Little Gray's Great Migration is vetted by experts and designed to encourage parental engagement. Its extensive back matter helps teachers with time-saving lesson ideas, provides extensions for science, math, and social studies units, and uses inquiry-based learning to help build critical thinking skills in young readers. The Spanish translation supports ELL and dual-language programs. The interactive ebook reads aloud in both English and Spanish with word highlighting and audio speed control to promote oral language skills, fluency, pronunciation, text engagement, and reading comprehension.