Integer Combinations—Postage Stamps Problem (HS Version)

This Integer Combinations—Postage Stamps Problem (HS Version) activity & project also includes:

It seems the post office has run out of stamps! Learners build all the values of postage available if the post office only sells five- and seven-cent stamps. The task provides an opportunity to create an expression in two variables and evaluate outcomes.

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CCSS: Designed
Instructional Ideas

  • Initially, present the problem to individuals; create groups to discuss conclusions
  • Have groups present their methods of completing the task
Classroom Considerations

  • Previous experience creating algebraic expressions is helpful
Pros

  • Highlights key misconceptions
  • Includes a rubric to assess group discussion
Cons

  • None