Lesson 6

Spinning Differences

Est. Class Sessions: 2
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Mathematical Standards

3.OA.D
Solve problems involving the four operations, and identify and explain patterns in arithmetic. (3.OA.D.9)

Standards for Mathematical Practice

MP2.
Reason quantitatively.
MP3.
Construct viable arguments and critique the reasoning of others.
MP5.
Use appropriate tools strategically.
MP6.
Attend to precision.
MP8.
Look for and express regularity in repeated reasoning.

This lesson is similar to Spinning Sums. Students spin two matching spinners to generate random subtraction sentences and work in groups to look for patterns in differences.

Content in this Lesson

  • Using strategies and choosing tools to collect, organize, and graph data [MPE2].
  • Using patterns in data to make predictions [E1].
  • Identifying patterns in differences [E3].
  • Communicating solutions verbally and in writing [MPE5].
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Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Guide
Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Student Pairs

two clear spinners or a paper clip and pencil

Materials for the Teacher

Display of Math Practices page (Student Guide) Reference
Unit 2 Assessment Record

Materials Preparation

Gather Materials for Spinners. Students can either overlay clear spinners or use a pencil and a paper clip.

Assessment in this Lesson

Assessment Expectation Assessed Math Practice Assessed

Spinning Differences Lab with Feedback Box
Student Activity Book
Pages 53–60
E1.
Make predications and generalizations using tables and graphs.
E3.
Identify patterns in sums and differences.
MPE2.
Find a strategy. I choose good tools and an efficient strategy for solving the problem.
MPE5.
Show my work. I show or tell how I arrived at my answer so someone else can understand my thinking.

Vocabulary in this Lesson