Students will demonstrate knowledge of capacity by using one container to compare the capacity of different containers.
Introduction (10 minutes)
- Explain to students that today they are going to show you what they know about the capacity of an object, or the maximum amount an object can hold.
- Let students know that today's class will be held outside in the sandbox.
- Give the students 3-5 different containers, such as pudding containers, applesauce containers, and yogurt containers.
- Give each student a scoop of some kind, such as measuring spoons.
Explicit Instruction/Teacher Modeling (15 minutes)
- Go out to the sand pit.
- Have students bring their math journals and pencils with them.
Guided Practice/Interactive Modeling (5 minutes)
- Give students 5 minutes to make their estimates of how many scoops each container will hold. Have students record their estimates in their journals.
- To show their mastery of relative size, you can ask your students to record their estimates in size order, from greatest to least.
Independent Working Time (10 minutes)
- After recording their estimations, students will take their containers and scoops into the sand and start filling them. Remind the students to record the number of scoops for each container.
- Enrichment: Advanced students may want to measure the capacity of more objects, or oddly shaped objects.
- Support: Struggling students may benefit from working with a partner.
Assessment (15 minutes)
- Have students indicate which container has the greatest capacity and which container has the least capacity.
- Ask students to answer these questions in their journal: Which container has the greatest capacity? How do you know?
Review and Closing (10 minutes)
- Have two or three students discuss their findings by following this format: "My estimate for this container was ____ scoops and it held ____ scoops. I thought that this container would hold ____ scoops but it held ____ scoops." Have students explain why they think they were correct or incorrect.