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
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Conversion of Centimeters to Millimeters using Yarn

Unit 2: Metric Measurement
Lesson 5 of 18

Objective: SWBAT use the correct tool to measure and convert from a larger unit to a smaller unit.

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.

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