This curriculum bulletin is designed to help teachers meet the diverse needs in mathematics of the children in fifth grade classes. In addition to the emphasis that is placed on arithmetic computational skills, the bulletin shows how to include other areas considered important, such as concepts, skills, and ideas from algebra and geometry. The 80 units of the bulletin are organized into the following categories: (a) sets, number, numeration; (b) operations; and (c) geometry and measurement. The units are sequentially planned and follow a spiral pattern. (RP)