CCSS.Math.Content.3.MD.A

CCSS.Math.Content.3.MD.A is a cluster heading. These are the individual standards under it.

• CCSS.Math.Content.3.MD.A.1

  Tell and write time to the nearest minute and measure time intervals in minutes. Solve word problems involving addition and subtraction of time intervals in min...

• CCSS.Math.Content.3.MD.A.2

  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 ...

01

What Students Need to Do

Students solve word problems about elapsed time, liquid volume, and mass. They measure or estimate using minutes, grams, kilograms, and liters, then choose an operation and include units.

02

What Mastery Looks Like

Students choose suitable units, read measurement tools, and estimate whether an answer is reasonable. They solve one-step problems using addition, subtraction, multiplication, or division and label answers correctly.

03

Common Misconceptions

Students may subtract clock numbers as if time were base ten, especially when an interval crosses an hour. They may confuse grams with kilograms, or liters with milliliters, and choose unreasonable units or operations.

04

How to Assess It

Give an exit ticket: “Practice starts at 3:45 and ends at 4:20. How long is practice? Show your method.”

1. 01

   Set up stations where students weigh classroom objects, measure water in marked containers, and time one-minute tasks.

2. 02

   Ask students to explain two ways to find the elapsed time from 10:35 to 11:10.

3. 03

   Play measurement match using cards with objects, estimates, units, and measured values that students pair and justify.

4. 04

   Plan a class picnic by calculating drink volume, food mass, and the time available for eating and cleanup.

• CCSS.Math.Content.4.MD.A

  Solve problems involving measurement and conversion of measurements from a larger unit to a smaller unit.

• CCSS.Math.Content.4.MD.A.2

  Use the four operations to solve word problems involving distances, intervals of time, liquid volumes, masses of objects, and money, including problems involvin...

• CCSS.Math.Content.7.G.B

  Solve real-life and mathematical problems involving angle measure, area, surface area, and volume.