## Reflection: Connection to Prior Knowledge Using a Factor Pair Calculator to Check Factor Pairs from 51-100 - Section 5: What did you notice?

I loved the discussion we had about finding factor pairs above 50! They could show me through their discussion that they were thinking in different ways about numbers and number sense than just memorizing a set of math facts. Factor pair knowledge is the way we really use multiplication. No one walks up to us and asks us to recite facts! While it's a good starting point, this CC standard that forces them to figure out factor pairs deepens their understanding of how factors and products are used. It gets them comfortable with division in a sneaky sort of way.

I think this particular standard has been one of the most difficult to master in the transition. It is just because we have been so conditioned to work with just fact memorization and to believe that it is the way to be fluent in our number sense and calculations.

It's exciting to know that things are getting richer through Common Core.

Rich Discussion
Connection to Prior Knowledge: Rich Discussion

# Using a Factor Pair Calculator to Check Factor Pairs from 51-100

Unit 4: Concepts of Multiplication
Lesson 4 of 12

## Big Idea: Using listing strategies, divisibility rules and a factor pair calculator, students will find factor pairs 51-100 and relate ideas surrounding what they discover.

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Standards:
Subject(s):
Math, Number Sense and Operations, factor pairs, technology, prime, composite, Operations
65 minutes

### Mary Ellen Kanthack

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