P – EC – RT7

Two students were estimating the number of people on the playground. One student used a referent of 5 while another student used a referent of 20. How could both referents be appropriate? Explain your thinking.

P – EC – RT8

When estimating a large number of people, Janie asked people to gather into groups of 10. What would Janie’s reasoning be for asking people to group? Could she have grouped them in other ways?

P – EC – RT9

Taylor and Sam estimated the number of people in line for hockey tickets. Both used referents of 20, but they had different estimates. How is this possible if they used the same referent?

P – EC – RT10

Terry and Reid estimated the number of people in line for concert tickets. Terry used a referents of 10 while Reid used a referent of 20. They estimated the same number of people. How is this possible if they used different...

P – COA – RT6

Teacher wanted a question that would have a lot of possible responses. What could the question be and collect data for it from your classmates.

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