3.MD.2 - About the Math, Learning Targets, and Rigor

Grade 3 Measurement

3.MD.A.2

Full Standard

Measure and estimate liquid volumes and masses of objects using standard units of grams (g), kilograms (kg), and liters (l). Add, subtract, multiply, or divide to solve one-step word problems involving masses or volumes that are given in the same units, e.g., by using drawings (such as a beaker with a measurement scale) to represent the problem.

Measurement Topic

This standard is reported on the report card in these quarters as follows:

**3rd Grade Students Learning 3rd Grade Standards**
Quarter 1	Quarter 2	Quarter 3	Quarter 4
			Report Card Measurement Topic: Solves one and two-step word problems with any operation.

Learning Targets

Measure and estimate liquid volume using liters.
Measure and estimate masses of objects using grams and kilograms.
Represent and solve one-step word problems involving masses or volumes using addition, subtraction, multiplication, and division.

About the Math

Liquid measure or capacity are used to refer to the amount that a container will hold. Liquid measure is measured in liters, ounces, gallons, or quarts. Mass is a measure of the amount of how heavy an object is and is measured using grams or kilograms. Benchmarks for mass include a shoelace with a mass of about 1 gram, a nickel has a mass of about 5 grams, and a textbook has a mass of about 1 kilogram. Note: The standard is specific and technically limited to grams, kilograms, and liters. However, it is completely appropriate for students to work with standard measurement units including cups and gallons, as these are also measures of capacity. Students are not expected to have mastery of these additional units. Essential vocabulary for this standard includes: capacity, gram, kilogram, liter, mass, scale, standard units, and volume. Visit the online dictionary Links to an external site. for vocabulary support.

Units of Measurement

Customary	Metric
Length: inch, feet, yard, mile	Length: centimeter, meter, kilometer
Capacity: cup, pint, quart, gallon	Capacity: milliliter, liter, kiloliter
Weight/Mass: ounce, pound, ton	Weight/Mass: milligram, gram, kilogram
Temperature: Fahrenheit	Temperature: Celsius

Progression of Standard within Grade 3

This progression informs how to develop the standard within the grade level. This progression is provided by HCPSS Elementary Mathematics.

Progression Throughout Year
Quarter 1	Quarter 2	Quarter 3	Quarter 4
			Measure and estimate liquid volume using liters. Measure and estimate masses of objects using grams and kilograms. Represent and solve one-step word problems involving masses or volumes using addition, subtraction, multiplication, and division.

Progression of this Standard Across Grades

This progression is informed by the Achieve the Core Coherence Map Links to an external site.. Information is not the complete standard.

Progression Across Grade Levels
Grade 2	Grade 4
This concept is not taught prior to grade 3.	Relative size of units and equivalents ( 4.MD.1 )

TASKS

These tasks can be used with small group or whole group instruction.

A gallon of milk holds 16 cups of milk. The preschool class is having milk and cookies for snack. Each child drinks 1 ½ cups of milk for snack. There are 12 students in the class. How much milk should the teacher buy? Explain your answer.
Emmett made 12 cakes. It takes about 2 ½ cups of milk to make one cake. About how many total cups of milk did he use?
The teacher wrote gallon, quart, pint, and pound on a chart. Which word doesn’t belong? Explain your thinking.
A container holds about 4 gallons. Describe its size in other ways.
Describe something you would measure in kilograms.
If a paper clip has a mass of about 1 gram, what object might have a mass of 5 grams? How about 30 grams?

SLIDE-BASED TASKS

These links are HCPSS created instructional tasks. These tasks are provided in Google slides. These tasks should be used for inspiration and resources, but instruction should start with students having the opportunity to engage with the math first (often involving physical and/or visual models) followed by discussion and explicit instruction to ensure student understanding.

Module 15 • Time, Measurement, Graphing, and Shapes

Additional Tasks

These links provide instructional ideas connected to this standard. [NOTE: NCTM membership required for access to Illuminations lessons.]

How Heavy? Links to an external site.(Illustrative Math)
The Orange Links to an external site. (3 Act Task, G.Fletcher)
The Weight of Things Links to an external site. (NCTM Illuminations Lesson)
Finding Volume by Counting Frank Links to an external site. (NCTM Illuminations Lesson)
How Many Paper Clips? Links to an external site. (Georgia Department of Education, pg. 50-55)
More Punch Please! Links to an external site. (Georgia Department of Education, pg. 77-81)

Tasks From Print Resources

These publications have been provided for each school. They are typically stored in team closets or the media center. Check with your team leader if you cannot find them.

Print Resources
Book Title	Grade	Pages
Teaching Student-Centered Mathematics	K-3	238 (Capacity Sort, Activity 8.13) 239 (Capacity Lineup, Activity 8.14) 240 (Compare Boxes-Cubic Units, Activity 8.15)
Groundworks - Algebraic Thinking	2 3	48-55 (Weighing In) 72-79 (Weighing Blocks) 56 - 63 (Block of Cubes)
Hands-On Standards	3-4	140 (Finding Volume) 142 (Measure Weight)
Brain-Compatible Activities for Mathematics	2-3	99-101 107-109
NumberSense	1-2	44-48
Ten-Minute Math		89-93
Math In Practice Teaching Third-Grade Math	3	Module 12