Reflection: Grappling with Complexity Decomposing Arrays, Day 1 - Section 1: Warm Up


I pushed the envelope too much at this point and told them this is part of the distributive property and we were going to be doing this for the next week or so.  I tried to tell them that it meant distributing the 9 in the problem into the two numbers we decomposed (12 into 6+6), but this was too much. They were not ready for the number representation of the concept and the vocabulary word stills means very little to them.  Until they see it all in action and have an internal sense of the concept,  I would suggest doing the activity and then slowly adding in other parts of recording the work and giving the vocabulary. 

I need to remind myself to go slow to go fast!

  Too Much Too Fast
  Grappling with Complexity: Too Much Too Fast
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Decomposing Arrays, Day 1

Unit 3: Using Multiplication to Find Area
Lesson 3 of 12

Objective: Students will be able to deconstruct an array into two smaller arrays in order to find the total area.

Big Idea: Students need to practice deconstructing arrays with manipulatives in order to conceptualize the distributive property. This 3 day lesson takes the children through increasingly sophisticated activities to explore the "why" and "how" of this property.

  Print Lesson
Math, distributive property, multiplication, arrays, modeling with math, area
  55 minutes
deconstructing an array
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