Lesson Plan: Choosing Milliliters or Liters Mathematics • 3rd Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to identify objects with a capacity of 1 milliliter and 1 liter and choose between liters and milliliters to measure the capacity of containers.


Students will be able to

  • define liters and milliliters as units used to measure capacity,
  • identify common objects that have a capacity of about 1 liter or about 1 milliliter,
  • choose the appropriate capacity unit (milliliter or liter) for a given object.


Students should already be familiar with

  • the definitions of volume and capacity.


Students will not cover

  • nonmetric units of volume, such as gallons and pints,
  • cubic centimeters,
  • decimal or fractional measures, such as 13.6 liters.

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