## Reflection: Adjustments to Practice Estimation: Putting rounding skills in action using real life examples. - Section 2: Core Lesson

I possibly should have figured out how to estimate using addition in our example instead of subtraction , but it seemed more natural to discover how to use a real world situation to estimate and compare. It modeled it well and connected it to Social Studies well. It seemed to flow well, despite the fact that they really haven't been practicing large digit subtraction. They were more wrapped up in being interested in the result. That was good! And it sets them up for when we estimate subtraction. The enjoyment seemed to help the skill.

I noticed something about the understanding of the lead number as I reviewed Slide 4. I told them  that we would round to the lead number. I realized I had to be careful that they understood that "highest" place value and largest place value are the same thing and that we just call it the "lead" number because it is the first. Teaching students to round and apply the numbers reveals certain levels of understanding of place value and I think the concept of "lead" number works best!

Quick Reflection
Adjustments to Practice: Quick Reflection

# Estimation: Putting rounding skills in action using real life examples.

Unit 11: Place Value
Lesson 10 of 14

## Big Idea: Students begin to understand the how and why of estimation through storytelling, analyzing state populations and playing a dice game.

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12 teachers like this lesson
Standards:
Subject(s):
Math, Number Sense and Operations, Place Value, rounding, estimation, real world connections
60 minutes

### Mary Ellen Kanthack

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