Teacher resources and professional development across the curriculum

Teacher professional development and classroom resources across the curriculum

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Reasoning and ProofSession 04 OverviewTab atab btab ctab dtab eReference
Part A

Observing Student Reasoning and Proof
  Introduction | Problem: Building Rafts with Rods | Solution: Building Rafts with Rods | Student Work #1 | Questions and Answers #1 | Student Work Reflection #1 | Student Work #2 | Questions and Answers #2 | Student Work Reflection #2 | Observe Classroom | Classroom Practice | Your Journal


Evan was working with the yellow rod. The dimensions of one yellow rod are 5 cm by 1 cm by 1 cm:

yellow cuisenaire rods

Evan made this table:

yellow cuisenaire rods

He noticed that every time he added a yellow rod to the raft, he increased the surface area by 12 square centimeters, but he couldn't figure out how to translate this fact into a rule.

next  Consider some questions you might ask Evan

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