These small books cover many different measurements in a concise fashion. Distance, weight, area, volume, time, and metric measurements are discussed. After an introduction, each topic is given a spread; a description is clearly written in a few sentences on the left and an example appears on the right. The color photos are attractive. . . . Each title concludes with a “Fun facts” page, a quiz, and a simple glossary. These books are excellent for their discussion of lesser-known units, such as survey township, gross, eon, grain, league, and cubit, which would even be helpful for students on the older side of the target audience. Valuable introductions for classroom discussion and units about measurements.