A Liter Please
Students will be able to measure and estimate liquid volume, using liters as the standard unit of measurement.
- 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.
- 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.