I wrote these to books to reveiw foodchains. They are both at lower reading levels so that students who are reading below (and well below) grade level can read the information on their own.
I created the book so that the students would be able to use reading comprehension skills to create the pictures and titles for the books.
If you are like me and have high readers too, you can use the ocean foodchain book and add more blank boxes. Challenge your higher readers to add to the food chain or add to the book.