Make Math Work: Fractions - Plumber Preparing Indigenous Students for Apprenticeship and Employment by Miranda Miller and Robert Horton is one of the titles in Ningwakwe's new series, Make Math Work. Each 24-page book in the series focuses on one area of math and numeracy as it relates to a particular job or career. This title begins by introducing an Ojibwe example of traditional knowledge such as the significance of water and the role it plays in everyday lives. Plumbers must know about fractions, decimals, and measurement using the metric and imperial systems. The first section of the book identifies how to recognize fractions for plumbing, simplifying fractions, and common measurements in plumbing. The remaining sections cover adding and subtracting fractions; and converting measurements from fractions to decimals, metric to imperial, and imperial to metric.