Unit 6, Lesson 7
Introducción al volumen líquido
Grado 3
Preparation
Lesson Narrative
In previous lessons, students measured and estimated the weight of objects in grams and kilograms. In this lesson, students learn that the volume of a liquid is the amount of space a liquid takes up. They also learn that the volume of a container is the amount of liquid it takes to completely fill the container. Students consider the challenges of directly comparing volumes of liquids and containers by just looking at them. Students use informal units (such as plastic cups, spoons, and so on) to compare the volume of two containers. Finally, students are introduced to the liter as a metric unit of liquid volume. They create a tool for measuring volume in liters by filling a container and making a mark for each liter as it’s added to the container. A clear container is used so students can see the level of the liquid and a dry-erase marker is used so the marks can be erased after the lesson.
To build a conceptual understanding of volume, it is extremely helpful for students to have firsthand experience of comparing liquids in different containers. To make that possible, some new materials and preparation are required for this lesson.
- Engagement
- MLR5
- Comprehend (in spoken and written language) the meaning of the terms “volume of a liquid," “volume of a container,” and “liter.”
- Explain (orally) how to estimate, measure, and compare the volume of containers using informal units and liters.
- Aprendamos sobre el volumen de líquidos y recipientes.
Required Materials
Activity 2
Required Preparation
Each group of 4 needs:
- a supply of water (1 liter bottles would work and could be reused for the next activity)
- two containers that are different in shape, but close in size, each labeled with “A” and “B”
- a small container labeled with “unit,” such as a large spoon, film canister, or a small measuring cup
- a tray or towel to work on (optional)
Gather the following materials:
- a large clear container that can be written on, such as a gallon water jug with top removed or clear storage bin
- 1-liter container (1-liter water bottle, measuring cup, etc.)
- a supply of water (enough to fill the larger container)
- OR the Liquid Volume in Liters video: https://vimeo.com/451620298
Teacher Reflection Questions
What surprised you about how students think about measuring of the volume of liquids and containers in the first activity? What strategies did you anticipate? Which did you not anticipate?