I have designed many of these literacy units to use in guided reading groups. They are a great way to align your lessons to the common core standards while creatively branching off of the adopted curriculum texts. Students read each book several times while working in the unit; Teacher read, popcorn read, partner read, independent reading,... Each day the story is reread and answers are found in the book. This is also a great way to introduce research like papers for older students. Finding the answer in the story promotes comprehension skills and response to literature writing. I use these units with about 3 books from the series. Then we do a compare and contrast of the stories.