Students explore measurement using kilograms, grams, liters, milliliters, and intervals of time in minutes.
Math
Unit 7
3rd Grade
In Unit 7, 3rd grade students solve problems involving measurement and estimation of intervals of time, liquid volumes, and masses of objects. The unit, while major work itself, also “support[s] the Grade 3 emphasis on multiplication and the mathematical practices of making sense of problems (MP.1) and representing them with equations, drawings, or diagrams (MP.4)” (GM Progression, p. 18).
Students begin by building on their understanding of telling time to the nearest five minutes from 2nd grade (2.MD.7) to tell and write time to the nearest minute using analog and digital clocks (3.MD.1). Students relate the face of an analog clock and time measurement more generally to the number line. Just as students used a number line to represent sums and differences in 2nd grade (2.MD.6), students use the number line to represent addition and subtraction problems involving elapsed time in minutes and durations of time (3.MD.1).
Building on the estimation skills with length gained in 2nd grade (2.MD.3), students in 3rd grade use the metric units of kilograms, grams, liters, and milliliters to estimate the masses and liquid volumes of familiar objects (3.MD.2). Students also measure objects in those units, reading the measurement scales on analog tools such as beakers. Finally, just as students solved word problems involving lengths in 2nd grade (2.MD.5), students solve word problems involving masses or volumes given in the same metric units (3.MD.2).
Students will rely on the work of this unit to convert from a larger unit to a smaller unit in 4th grade (4.MD.1) and from a smaller unit to a larger one in 5th grade (5.MD.1), as well as to solve multi-step word problems involving intervals of time, liquid volumes, and masses of objects, including problems involving simple fractions or decimals (4.MD.2, 5.MD.1). Beyond the direct connections to Grades 4 and 5 Common Core State Standards, “measurement is central to mathematics, to other areas of mathematics (e.g., laying a sensory and conceptual foundation for arithmetic with fractions), to other subject matter domains, especially science, and to activities in everyday life. For these reasons, measurement is a core component of the mathematics curriculum” (GM Progression, p. 1).
Pacing: 15 instructional days (12 lessons, 2 flex days, 1 assessment day)
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The following assessments accompany Unit 7.
Have students complete the Pre-Unit Assessment and Pre-Unit Student Self-Assessment before starting the unit. Use the Pre-Unit Assessment Analysis Guide to identify gaps in foundational understanding and map out a plan for learning acceleration throughout the unit.
Have students complete the Mid-Unit Assessment after lesson 6 .
Use the resources below to assess student understanding of the unit content and action plan for future units.
Before you teach this unit, unpack the standards, big ideas, and connections to prior and future content through our guided intellectual preparation process. Each Unit Launch includes a series of short videos, targeted readings, and opportunities for action planning to ensure you're prepared to support every student.
gram
kilogram
liter
liquid volume
mass
milliliter
To see all the vocabulary for Unit 7 , view our 3rd Grade Vocabulary Glossary.
Topic A: Time Measurement
Topic B: Mass and Liquid Volume Measurement
Key
Major Cluster
Supporting Cluster
Additional Cluster
CCSS.MATH.PRACTICE.MP1 — Make sense of problems and persevere in solving them.
CCSS.MATH.PRACTICE.MP2 — Reason abstractly and quantitatively.
CCSS.MATH.PRACTICE.MP3 — Construct viable arguments and critique the reasoning of others.
CCSS.MATH.PRACTICE.MP4 — Model with mathematics.
CCSS.MATH.PRACTICE.MP5 — Use appropriate tools strategically.
CCSS.MATH.PRACTICE.MP6 — Attend to precision.
CCSS.MATH.PRACTICE.MP7 — Look for and make use of structure.
CCSS.MATH.PRACTICE.MP8 — Look for and express regularity in repeated reasoning.
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Tell time to the nearest minute.
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