## Reflection: Developing a Conceptual Understanding Conversion of Centimeters to Millimeters using Yarn - Section 3: Practicing in the classroom

In this Educreations clip, I am showing a couple of samples of work where you can see the students' work in mastering the part of the standard that talks about relative sizes and of conversions. In order for them to grasp relevant sizes on a higher level, I wanted them to learn to measure, convert using the ruler by counting by tens and be able to see how 22 cm looks and that 220 mm is not larger. This assignment gives them a concrete understanding that even though we have multiplied by 10, both 22cm and 220 mm are exactly the same thing. Through this understanding, I can build from here leading them to understand decimeters. If they see the units as we construct them in powers of ten, liters and grams will be more easily understood and converted.

A concrete introduction
Developing a Conceptual Understanding: A concrete introduction

# Conversion of Centimeters to Millimeters using Yarn

Unit 2: Metric Measurement
Lesson 5 of 18

## Big Idea: Students have a blast cutting and measuring, in centimeters, 5 lengths of yarn. They then convert the units to millimeters using a centimeter ruler as the number line model.

Print Lesson
2 teachers like this lesson
Standards:
45 minutes

### Mary Ellen Kanthack

##### Similar Lessons

###### Stairway to Learning! Moving Your Way to Understanding Metric Unit Conversions
6th Grade Science » Scientific Measuring and Variable Testing
Big Idea: Many 6th graders find it difficult to understand the metric system. By going outside and drawing life-size staircases with chalk, this lesson provides students with a kinesthetic way to become comfortable with metric unit conversions.
Favorites(29)
Resources(16)
East Walpole, MA
Environment: Suburban

###### Buckling and Bending the Earth's Surface - Weathering Day 1
4th Grade Science » Weathering Wreaks Havoc
Big Idea: Students will explore and understand that the crust of the earth is constantly moving and changing over time due to weathering processes.
Favorites(30)
Resources(14)
Anchorage, AK
Environment: Urban

###### Squares in a Row Day 2 of 6
7th Grade Math » Writing expressions
Big Idea: Students will calculate the number of squares on a checkerboard without counting and will begin to notice patterns emerging in a data table.
Favorites(1)
Resources(22)
Dixon, CA
Environment: Suburban