- Third Grade
- 60 minutes
- Standards: 3.MD.A.2
This lesson introduces students to measuring and estimating liquid volume, using liters (l) as the standard unit of measurement.
Students will be able to measure and estimate liquid volume, using liters as the standard unit of measurement.
Introduction (15 minutes)
- Tell your students that they will learn about the liter (l), which is a metric unit of measurement, as opposed to a standard unit of measurement.
- On the board, write the word liter with its abbreviation l.
- Show the students the container with the capacity, or the space a solid, liquid, or gas takes up, of a liter.
- Ask your students where they might see the liter as a unit of measurement. For example, it is found on some grocery products such as canned goods.
Explicit Instruction/Teacher Modeling (15 minutes)
- Demonstrate to your students what they will do in groups later.
- Collect everything you need for this activity: two medium-sized containers, one 1 liter container, a container of water, a plastic container or sheet to shield objects from water, and the worksheet.
- Give the containers names on the worksheet so that you can keep track of which container you're using.
- In front of the class, estimate if the medium-sized container can hold less than one liter, more than liter, or exactly one liter.
- Pour water into the medium-sized container until it is full.
- Then, to measure how much water you actually poured in, pour that water from the medium-sized container into the one liter container.
- Check the estimate and compare it to the actual result.
Guided Practice/Interactive Modeling (5 minutes)
- Group the students in three to four groups of three to four students.
- Give each group two different medium-sized containers, one 1 liter container, a container full of water, and a plastic container or sheet to cover objects. Give each student one worksheet.
Independent Working Time (15 minutes)
- Instruct your students to complete the activity and the worksheet as you modeled. Make sure they measure both of the medium-sized containers.
- Have them fill out the bottom of the worksheet.
- Walk around and observe the students as they work on completing the activity.
- Monitor the students as they work, making sure the activity is done appropriately.
- During this time, ask questions to make sure the students understand the concept of liquid measurement.
- Enrichment: Have more than two medium-sized containers available for your students.
- Support: Give your students a a smaller container that is less than one liter. Make sure your students understand "less than" before moving on.
Related Books and/or Media
Assessment (5 minutes)
- At the end of the independent working time, ask your students to identify the medium-sized containers as less than, equal to, or more than one liter.
Review and Closing (5 minutes)
- Ask for a spokesperson from each group to share the group's findings.
- After each group has shared the results of their activity, ask the class if there are any questions or comments.