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Introduction to Measurement

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2 Engage How have you used measurement in the last week? Jot down 3 or 4 ways you have used measurement in your daily life. Then, label each example with a “T” (used a tool) or an “E” (made an estimate). Finally, note how you arrived at each measurement: perceptually, using a benchmark, or unit (standard or nonstandard).

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3 Sharing Time For the next few minutes, share one or two of your measurement experiences with your tablemates. As a group, discuss whether most of your daily experiences were the result of using an estimate or using a tool. And, share any benchmarks or strategies that you used in arriving at your measurements. Be prepared to share your table’s observations.

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4 Measurement in the Real World Measurement is integral to our everyday lives. We learn measurement concepts and skills through experience. Most of our daily measurements are estimates. The real world is interdisciplinary.

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5 Explore Two identical transparencies have been rolled into cylinders - one, tall and slender and the other, short and wide. They have been taped along the edges to avoid any overlap.

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6 Explore The tall, slender cylinder is then placed inside the short, wide one and filled to the top with popcorn.

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7 Prediction When the tall cylinder is lifted, will the popcorn… 1.Fill the shorter cylinder to the top, 2.Overflow, or, 3.Not completely fill the shorter cylinder?

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9 Explain What attribute are we actually measuring when we fill the cylinders with popcorn? What attribute are we measuring when we look at the lateral sides made by the two transparencies?

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10 Elaborate How would you build a cylinder if you wanted to contain the maximum volume of corn using the same amount of lateral surface materials? Can you think of a real world context for this activity?

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11 Elaborate What are the various attributes of a cylinder that can be measured? Take a few minutes to discuss this with your tablemates.

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12 Important Measurement Ideas The process of measurement includes: Selecting/identifying the attribute or property to be measured Choosing an appropriate unit of measure that has the same attribute Making an estimate Comparing the chosen unit to the object to be measured Determining the number of those units by counting, using an instrument, and/or a formula

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13 Important Measurement Ideas Remember to express the measurement in terms of a number and a unit.

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14 © Bil Keane, Inc. King Features Syndicate

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15 Used with permission; http://www.cartoonstock.com

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16 Important Measurement Ideas Definition of Measurement: Measurement is the process of quantifying the attribute or property of an object by comparison with some unit (nonstandard or standard).

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17 Important Measurement Ideas Measurements are approximations! There is always a margin of error. Why? The smaller the unit, the more precise the measurement. What is the smallest unit that our students are required to use for each attribute of measurement at each grade level in the TEKS?

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18 Let’s Measure!

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