### Lesson plan

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

(15 minutes)
• Tell your students that they will learn about the Litre(l), which is a metric unit of measurement, as opposed to a standard unit of measurement.
• On the board, write the word LitreWith its abbreviation L.
• Show the students the container with the Capacity, or the space a solid, liquid, or gas takes up, of a litre.
• Ask your students where they might see the litre as a unit of measurement. For example, it is found on some grocery products such as canned goods.
(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 litre 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 litre, more than litre, or exactly one litre.
• 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 litre container.
• Check the estimate and compare it to the actual result.
(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 litre container, a container full of water, and a plastic container or sheet to cover objects. Give each student one worksheet.
(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 litre. Make sure your students understand "less than" before moving on.
(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 litre.
(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.

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