Lesson Plan: Converting Mass: Ounces, Pounds, and Tons Mathematics • 4th Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to ​​convert between whole numbers of ounces, pounds, and tons.


Students will be able to

  • use the fact that there are 16 ounces in 1 pound to convert between ounces and pounds,
  • use the fact that there are 2,000 pounds in a ton to convert between pounds and tons,
  • recognize whether multiplication or division is needed to convert between units,
  • compare measurements in ounces, pounds, tons, and mixed measures,
  • solve simple word problems involving a conversion of units.


Students should already be familiar with

  • measuring mass in ounces, pounds, or tons,
  • multiplying up to 4 digits by 1 digit,
  • multiplying 2 digits by 2 digits,
  • dividing 4 digits by 1 digit.


Students will not cover

  • converting numbers other than whole numbers.

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