Resources and Tools for Elementary Math Specialists and Teachers

Arrays for Operation Sense

This discussion is part of a collection:CCSS Practice Standard 7

The resource “Illustrating Number Properties with Arrays” brings to mind how much more concrete the array model is than its cousin the area model. Arrays also can help with operation properties and algorithms, as well as bridging to the more abstract area model.

I find evidence of this in another ML resource – a 4-minute vid called “Cluster Problems.” The student is using grid paper and shading in partial product areas, but still referring to those products using array language. Do you have effective array lessons you’d like to share?


There is another really great resource that uses arrays in this catalog, it is called Factorize. Factorize is an interactive application where students must create an array that achieves the target product. The application keeps track of how many different ways this can be done by listing expressions and keeping track of arrays. This resource is great to challenge students to find the most arrays!