Lesson plan

5. Compare fractions to common benchmarks (0, half, and 1) (FP)

teaches Common Core State Standards CCSS.Math.Content.4.NF.A.2 http://corestandards.org/Math/Content/4/NF/A/2
teaches Common Core State Standards CCSS.Math.Practice.MP3 http://corestandards.org/Math/Practice/MP3
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5
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Lesson objective: Compare fractions to common benchmarks of 0, half, or 1.

This lesson helps to build procedural skill with comparing fractions to a benchmark fraction. A number line is used here because it highlights a fraction's distance from the benchmark. This work develops students' understanding that fractions can be compared to a benchmark, and then the benchmark can be used to compare two or more fractions.

Students engage in Mathematical Practice 5 (students use appropriate tools strategically) as they decide which tool, including mental skills, will help them compare a fraction to a benchmark. Students continue to work with number lines, area models, and mental skills as they use the benchmark fractions to compare other fractions.

Key vocabulary:

  • benchmark
  • denominator
  • equivalent
  • half
  • numerator