Using big, bright numbers and images interspersed with photos of children confidently smiling, the author lays out basic arithmetical operations, from 2+2=4 to measuring weights and distances. The author explains how to use groups and number lines to reach solutions. . . . Each volume includes both number and word problems, and ends with a hands-on activity. The frequent focus on practical applications gives this a leg up over more fanciful introductory series, such as Heinemann’s “Animal Math.” Lively support for primary level arithmetic instruction.