Liquid volume estimation station: a 30-minute 3rd grade measurement activity
What it is: a 3rd grade measurement station where students estimate how many liters or milliliters different containers hold, then measure by pouring water. Students build a sense of how much a liter is.
Time: about 30 minutes. Grade: 3rd grade.
Materials: a 1-liter measuring jug, a 100-milliliter measuring cup, 5 containers of different sizes (a cup, a bowl, a water bottle, a vase, a small bucket), water, towels and a tray.
- Show a 1-liter bottle. Pass it around so everyone feels how heavy 1 liter of water is.
- Students estimate how much each container holds and write it on their sheet.
- Groups measure by filling each container with the jug or the cup and counting.
- Groups compare their estimate with the measurement and find the difference.
- Ask: "Did your estimates get closer as you went? Why?"
Safety: work on a tray, wipe up spills right away so no one slips, and use plastic containers, not glass.
Differentiation: students who need support estimate only more or less than 1 liter. Students who are ready convert between liters and milliliters. English learners can use the frame "I think it holds about ___ liters."
Quick check: show a container and ask a student whether it holds more or less than 1 liter, and why.
For more ideas at this grade, browse the other free activities on the Hub.
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About this resource
- Shared by
- @UpOnlyLearning · Curriculum team
- Posted
- Oct 29, 2026
- Type
- Lesson plan
- Grade
- Grades 3–5
- Subject
- Math
- Language
- English
- License
- Free for classroom, co-op and tutoring use. Please don't resell.