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

Lesson Plan

6. Using Cluster Estimation (FP)

teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1
teaches Common Core State Standards CCSS.Math.Content.4.MD.A.2 http://corestandards.org/Math/Content/4/MD/A/2
teaches Common Core State Standards CCSS.Math.Content.4.OA.A.3 http://corestandards.org/Math/Content/4/OA/A/3
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: Use cluster estimation to estimate sums and products when the numbers being added or multiplied cluster near or are close in value to a single number.

This lesson helps to build procedural skill with cluster estimation and help students determine which estimation strategies are most efficient for different contexts of problems.  Bar models are used here because it helps students visualize the relationship amongst the quantities and models efficient problem solving with more complex tasks. This work develops students' understanding that in addition to rounding, we can use mental computation strategies to assess the reasonableness of responses.

Students engage in Mathematical Practice 1 (make sense of problems and persevere in solving them) as they explain to themselves the meaning of the problem and how to go about solving it.  They should check their thinking and solutions by asking themselves, "Does this make sense?"  

Key vocabulary:

  • approximation
  • cluster estimation
  • reasonableness

Special materials needed:

  • Smartboard, document camera, or overhead projector
Related content

Appears in

Solving measurement problems using the four operations

Provide feedback