P – EC – WP13

Two children were looking at stars in the sky. To estimate the number of stars in the sky, one child said she would use a referent of 5 while the other child said she would use a referent of 50. Which referent would be more suitable for estimating stars in the sky?...

P – EC – WP14

Two children were looking at the number of school buses in the parking lot. To estimate the number of school buses in the parking lot, one child said she would use a referent of 10 while the other child said she would use a referent of 100. Which referent would be...

P – EC – PP9

True or False? There are about 50 people in line.

P – EC – WP1

There were boxes of crayons covering the top of Charlie’s desk. The boxes of crayons were side-by-side, and none were on top of each other. The teacher asked Charlie to estimate the number of boxes on the top of the desk. Charlie said 50. Would you agree with Charlie?...

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