The geometric formula for the area of a rectangle is formally introduced subsequently to the learners' developing it through discovery.
These resources are part of KET's Math Instructional Strategies: Geometry collection.
Introducing the formulas for geometric problem-solving before learners have a good understanding of just what is entailed can be risky. Formulas are more abstract than some learners are ready for. When possible, methods that allow learners to discover the formula are less foreign and allow more time for learners to work with the problems. More time working with an intuited formula not only helps learners understand how the formula is derived, but under pressure, when the learner may forget the official formula, they may also be able to recreate it based on the foundational knowledge gained through discovery.
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.