Lesson Plan: Common Denominators Mathematics • 4th Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to find a common denominator of two proper fractions by using models or listing multiples and use this to write both fractions over the same denominator.


Students will be able to

  • use models to find common denominators of two fractions,
  • list multiples to find common denominators of two fractions,
  • create equivalent fractions with common denominators.


Students should already be familiar with

  • finding equivalent fractions.


Students will not cover

  • adding or subtracting fractions with different denominators,
  • comparing and ordering fractions.

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