Betsy Popple uses a lecture-based style of instruction to introduce the concept of area and to briefly review perimeter.
These resources are part of KET's Math Instructional Strategies: Geometry collection.
Adult learners often struggle with the difference between the perimeter and the area of a shape. In general, addition is used to find the perimeter, while multiplication is the operation of choice in finding the area. Thus, the perimeter is measured linearly (inches, centimeters, miles) and the area is measured in square units (or units squared; square inches, sq. ft., miles2). Knowing the differences in the operations and relating the concepts to real-world applications (i.e. fencing, buying sod, etc.) can help learners to more fully understand the differences in these concepts.
Academic standards correlations on Teachers' Domain use the Achievement Standards Network (ASN) database of state and national standards, provided to NSDL projects courtesy of JES & Co.
We assign reference terms to each statement within a standards document and to each media resource, and correlations are based upon matches of these terms for a given grade band. If a particular standards document of interest to you is not displayed yet, it most likely has not yet been processed by ASN or by Teachers' Domain. We will be adding social studies and arts correlations over the coming year, and also will be increasing the specificity of alignment.