P – EC – RT11

Jamie, Matty and Reid estimated how many balloons were at the party. Jamie used a referent of 10, Matty used a referent of 25 and Reid didn’t use a referent. All three of their estimates were very close. How could their estimates have been so close if they all...

P – EC – RT1

A group of students were learning about using referents when estimating. Some of these students argued that referents should be 10 while others argued that referents should be 100. When would be an appropriate time to use either referent? Explain your...

P – EC – RT2

A group of students were learning about using referents when estimating. Some of these students argued that referents should be 10 while others argued that referents should be 100. Are there times when a referent of 10 and a referent of 100 would be helpful? Explain...

P – EC – RT3

You and a friend are asked to estimate the number of attendees at your school’s graduation ceremony. If you were to estimate such a large crowd, how large would your referent be and how would you use it to estimate the number of...

P – EC – RT4

You are asked by your teacher to estimate how many books all of your classmates could fit into their backpacks. How would you determine a referent? What would your estimate be? Explain your thinking.

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