This is an exciting first look at the utility and function of graphs, set within a "field trip to the zoo" narrative. Author Melissa Stewart has written more than 60 books for kids and frequently contributes to publisher Scholastic's MATH magazine, and Dr. Cecilia Minden_Cup of Harvard served as the readability consultant.
The zoo is an ideal setting for applied math: There arre animals to count and sizes to compare. The photographs (from the San Frnacisco zoo) are breezy and uncluttered, although otherwise unremarkable. However, they do add some flavor to the two main math techniques presented: Tallying, as in |||| = 4, and bar graphs, which are especially useful when comparing height: The taller the bar, the taller the "animal's shoulder height (the height without measuring the neck and head)." This presentation is intuitive and fun, and leads to slightly more abstract concepts. A "taller" bar can also mean that there is more of something--it doesn't necessarily mean how tall something is.
The book argues persuasively for hte importance of learning graphs and pther forms of pictorial representations: "My teacher says that a picture is worth a thousand words." Three pages later, after showing a boy/girl/total students bar graph, this cliche is followed by a more surprising observation for the young reader: "MY teacher also says that a graph is worth a thousand bumbers." 32 shiny pages, with an overview of words and concepts, as well as a brief index, this is an excellent, non-threatening introduction to graph power!