CCSS.Math.Content.3.MD.A
The standard
Solve problems involving measurement and estimation of intervals of time, liquid volumes, and masses of objects.
Common Core State Standards for Mathematics
What this standard means
Students need to tell and use time to the nearest minute, figure elapsed time, and solve word problems about minutes. They also need to estimate and measure liquid volume and mass, then use grams, kilograms, and liters in one-step problems.
Mastery looks like choosing the right unit, reading tools correctly, and explaining the operation used. Students often mix up start time and end time, count elapsed time by hours only, or choose numbers from a word problem without thinking about the unit.
Ways to teach it
- Hands-on activity: Set up stations with clocks, liter bottles, gram weights, and objects for students to measure and record in a table.
- Writing prompt: Explain how you would find how long soccer practice lasted from 3:25 to 4:10.
- Quick assessment: Give three exit ticket problems, one elapsed time, one mass comparison, and one liquid volume word problem.
- Real-world connection: Use a recipe label and a school schedule to find liters needed and minutes spent on daily activities.
Plan a lesson for CCSS.Math.Content.3.MD.A
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- CCSS.Math.Content.3.MD.A.2
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