The Magical Minds have a pretty good understanding of what multiplication is. They know it has to do with groups of the same number. It is adding the same number over and over again. It is skip counting.
A 3x4 array of picture books
Building arrays is another way we explore multiplication. An array is a set of objects placed in rows and columns. Because we know the brain remembers connections, this is one more way we help our brain learn and remember multiplication facts. This manipulation of objects helps the visual, kinesthetic and naturalistic learners understand multiplication on a deeper and more meaningful level.
How Many Different Arrays Will Make 36?
Arrays also help us understand factors and division. Our class hasn’t gotten to the division discussion, but we are digging deep into the idea of factoring. Last week I used a lesson form NCTM‘s site, Illuminations where the third graders created factor posters. They first built and drew the arrays, and then used a “factor rainbow” to figure out all the numbers we can skip count to get to our product.
An Array Built From a Variety of Classroom Objects
This study of arrays will also come in handy when we begin our measurement unit. Arrays are simply width and length.
The Different Arrays You Can Build to Make 12
What kinds of arrays do you see in your life?
Do you see arrays in your home, at the store, on the road?
Related Articles
- Sidewalk Chalk Math (thehappyhousewife.com)
- Math Lesson Plans for Skip Counting (brighthub.com)
