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