Your device is currently offline. You can view downloaded files in My Downloads.

Lesson Plan

4. Apply length invariance to a real life scenario (A)

teaches Common Core State Standards CCSS.Math.Content.3.MD.B.4 http://corestandards.org/Math/Content/3/MD/B/4
teaches Common Core State Standards CCSS.Math.Content.3.NF.A.2 http://corestandards.org/Math/Content/3/NF/A/2
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5
Quick Assign

You have saved this lesson!

Here's where you can access your saved items.

Dismiss

Card of

or to view additional materials

You'll gain access to interventions, extensions, task implementation guides, and more for this lesson.

Lesson objective: Relate fractional invariance to a real life scenario.

This lesson provides an opportunity for students to apply their knowledge and understanding of the invariance of fractions to a mathematical situation. Students are asked to find start, end points, or total distance run along a ruler partitioned into different denominators.

Key Concept students will use: 

  • the quantitative measurement object is invariant (a toothpick's length does not change, regardless of how we align it to a ruler; the weight of a book doesn't change if we put another object on the scale with it)

Skills students will use:

  • unit fractions result from partitioning a whole; (Grade 3, Unit 4; 3.NF.A.1, 2a)

  • non-unit fractions are made up of unit fractions with the same denominator; (Grade 3, Unit 4; NF.A.1, 2a)

Students engage in Mathematical Practice 5 (use appropriate tools strategically) as they partition and align number lines and rulers in order to measure fractional lengths.

Key vocabulary: 

  • eighth
  • fourth
  • half
  • number line
  • partition
  • ruler
Related content

Appears in

Using fractions in measurement & data

Provide feedback