Virginia SOL 4.MG.1.b.i
The Standard
length of an object to the nearest U.S. Customary unit (1 2 inch, 1 4 inch, 1 8 inch, foot, yard) and nearest metric unit (millimeter, centimeter, or meter)
Virginia Standards of Learning for Mathematics · The student will reason mathematically to solve problems, including those in context, that involve length, weight/mass, and liquid volume using U.S. Customary and metric units.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students estimate an object’s length, then measure it with a ruler, yardstick, or meter stick. They read fractional-inch marks and metric marks, then record the nearest requested unit.
What Mastery Looks Like
- Students choose a suitable unit and tool for the object. They make a reasonable estimate, align the object at zero, and report the measurement with the correct unit and precision.
Common Misconceptions
- Students may begin measuring at the ruler’s edge instead of the zero mark. They may confuse millimeters with centimeters, misread fractional-inch marks, or choose an unreasonable unit such as yards for a pencil.
How to Assess It
- Give each student a pencil and both types of rulers. Ask them to estimate, then measure its length to the nearest quarter inch and centimeter.
Lesson moves
Ways to Teach It
Set up stations with classroom objects, rulers, yardsticks, and meter sticks for students to estimate and measure at each required precision.
Ask students to explain which unit they would use to measure a paper clip, desk, doorway, and playground, and why.
Play Measurement Match by pairing object cards with plausible length cards labeled in fractional inches, feet, yards, millimeters, centimeters, or meters.
Have students measure a bookcase space and select a storage bin that will fit, using dimensions from real product labels.
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Related Standards
- 4.MG.1.b.ii
weight/mass of an object to the nearest U.S. Customary unit (ounce, pound) and nearest metric unit (gram, kilogram); and
- 2.MG.1.b.i
the length of an object to the nearest inch, using a ruler;
- 4.MG.1.a.i
length in both U.S. Customary (inch, foot, yard, mile) and metric units (millimeter, centimeter, meter);
- 3.MG.1.b.i
length of an object to the nearest U.S. Customary unit (1 2 inch, inch, foot, yard) and metric unit (centimeter, meter);
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