Learning how to measure objects by using different units and other objects is a second grade, Common Core math skill: 2.MD.2. Below we show two videos that demonstrate this standard. Then, we provide a breakdown of the specific steps in the videos to help you teach your class.
Your students will have learned how to measure objects through non-standard units, like using paperclips to measure a pencil (1.MD.1). They should also be able to compare objects using terms like longer, shorter, longest, and shortest (1.MD.2).
In the future, understanding how to measure objects with a ruler will help your students expand on and apply the concept elsewhere. Students will be able to make a line plot, measure objects, and place those measurements on the plot (2.MD.9). Your students will also be able to use rulers marked with halves and fourths of an inch (3.MD.3) and apply “linear measurement to measure perimeter and area” (3.MD.5- 8).
Common Core Standard: 2.MD.2 - Measure the length of an object twice, using length units of different lengths for the two measurements
Students who understand this principle can:
2 Videos to Help You Teach Common Core Standard: 2.MD.2
Below we provide and breakdown two videos to help you teach your students this standard.
Video 1: Measure Sea Creatures in Different Units
The video starts by explaining that when people measure an object, they want to know how long that object is. It then shows that there are certain units of measurement that are standard: inches, feet, yards, millimeters, centimeters, and meters.
You can use a ruler to measure in standard units. The video briefly explains how to use a ruler, and then demonstrates using it to measure a 3 inch clownfish.
Then, it explains that larger units of measurements can be broken down into smaller units of measurement.
The video explains that the smaller the unit, the more units will be used to measure an object. It then shows this through 2 examples.
Video 2: Measure Things with Different Units and Objects
The video starts by helping Andy and Julie measure their math book. Andy says the book is 5 inches long, but Julie says it is about 13 centimeters long. Boddle says that both Andy and Julie are correct, and that they just used different units of measurement.
Boddle explains that objects can be measured in many different ways, measuring different objects to demonstrate the idea.
Next, Boddle measures a candy bar.
The video ends by reminding students that measurements can be done in lots of different ways.
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