Virginia SOL 3.MG.1.c
The Standard
Compare estimates of length, weight/mass, or liquid volume with the actual measurements.
Virginia Standards of Learning for Mathematics · The student will reason mathematically using standard units (U.S. Customary and metric) with appropriate tools to estimate and measure objects by length, weight/mass, and liquid volume to the nearest half or whole unit.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students estimate an object's length, mass, or liquid volume before using a suitable measuring tool. They compare the estimate with the measurement and tell the difference.
What Mastery Looks Like
- Students choose a suitable tool and unit, make a reasonable estimate, and measure to the nearest whole or half unit. They correctly state how much higher or lower the estimate is than the measurement.
Common Misconceptions
- Students may mix units, read a ruler from 1 instead of 0, or misread scale marks. They may change an estimate after measuring or think a good estimate must exactly match the measurement.
How to Assess It
- Give each student a marker and ruler. Have them estimate its length, measure it, then state whether the estimate was high or low and by how much.
Lesson moves
Ways to Teach It
Set up ruler, scale, and measuring-cup stations where students estimate each item, measure it, then record the difference.
Ask students to write: Was your estimate high or low, by how much, and what clue would improve your next estimate?
Play Estimate Match: students pair estimate cards with measurement cards, then score points for correctly naming each difference.
Plan a class snack by estimating and then measuring the water and ingredients needed for one batch.
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Printable 3.MG.1.c Worksheet
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Related Standards
- 4.MG.1.c
The 4th Grade version of this standard.
- 1.MG.1.b
Measure the length, weight, or volume of the same object or container with two different units and describe how and why the measurements differ.
- 1.MG.1.a.iii
volumes of two containers and compare the measurements using the terms more, less, or the same as.
- 1.MG.1.a.ii
weights of two objects (using a balance scale or a pan scale) and compare the measurements using the terms lighter, heavier, or the same as; and
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