In Topic C, students use different length units to measure and compare lengths. In Lesson 6, they practice applying their knowledge of centimeters and meters to choose an appropriate measurement tool. They discover that there is a relationship between unit size and measurement when they measure one object twice using different length units. They learn that the larger the unit, the fewer number of units in a given measurement. In Lesson 7, students continue to measure and compare lengths using standard and non-standard length units. At this point students are prepared to explicitly compare different nonstandard length units and can make inferences about the relative size of objects.
Grade 2 Mathematics Module 2, Topic C
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Common Core Learning Standards
|2.MD.1||Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks...|
|2.MD.2||Measure the length of an object twice, using length units of different lengths for the two...|
|2.MD.4||Measure to determine how much longer one object is than another, expressing the length difference...|