3.7.D

Math3rd Grade

The Standard

determine when it is appropriate to use measurements of liquid volume (capacity) or weight

Texas Essential Knowledge and Skills for Mathematics

Teacher's field guide

What This Standard Means

What Students Need to Do

Students decide whether a situation is about how much liquid a container can hold or how heavy something is. They use context clues, tools, and units to explain their choice.

What Mastery Looks Like

Students correctly choose capacity for how much liquid a container holds and weight for how heavy an item is. They can support each choice by naming a suitable tool or unit.

Common Misconceptions

Students may assume large objects are always heavy or that small containers hold very little. They may also confuse how much a container can hold with how much liquid is currently inside it.

How to Assess It

Give an exit ticket with two situations: the amount of juice a pitcher holds and the heaviness of a backpack. Students choose capacity or weight and explain each choice.

Lesson moves

Ways to Teach It

  1. Set out cups, bottles, books, and bags; students place each beside a balance or measuring cup and explain the matching attribute.

  2. Ask, “Would you describe a fish tank with capacity or weight, and when might each matter?” Students write two context-based answers.

  3. Play a card sort with scenarios such as filling a pool or mailing a package, then have partners defend any disputed cards.

  4. Examine labels on a milk jug and a bag of rice, then identify what each measurement tells a shopper.

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