Sidewalk Stones

One block, two blocks, white blocks, gray blocks. In the high school assessment task, learners investigate patterns of sidewalk stones to develop a quadratic expression for each colored block. Young mathematicians then use the expression to solve problems.

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CCSS: Designed
Instructional Ideas

  • Use the resource as a class activity
Classroom Considerations

  • The task is the "expert" version of the Sidewalk Patterns task
  • Learners need to know how to write and manipulate quadratic expressions and to factor trinomials

  • The easily understood context helps pupils make the connection to quadratic expressions
  • Resource includes rubric, making it easier to score

  • Includes spelling errors