Elementary-schoolers get a lively introduction to the scientific system of classification in this very visual installment in the Animals Have Classes Too! series (6 titles). After a brief description of classification, the text moves on to the star of the show: arthropods. Lots of full-color, high-resolution close-up photos of arthropods, all of which are labeled, spotlight the varied examples of life in this phylum, which includes insects, spiders, crustaceans, and millipedes. Because the book uses arthropods as a (very effective) example to focus more on how the classification system works, kids looking for in-depth info on the creatures could be a bit disappointed. But the facts within, while not necessarily in-depth, are nevertheless fascinating and should pique curiosity. With an engaging layout, an inviting tone, and ample back matter, this is a useful, multifaceted choice for science classrooms. -- Booklist, April 2019.