P – EC – PP29

What would you use as a reference to estimate the number of books in the pile?

P – EC – WP5

The school science club was interested in watching the different kinds of birds flying over the playground. What size of referent would you use if you were asked to estimate the total number of birds flying in the picture...

P – EC – PP30

Would a better referent be 10 or 50 for estimating the number of animals?

P – EC – WP6

The school science club was interested in watching the different kinds of birds flying over the playground. Estimate how many birds are flying in the picture below?

P – EC – PP31

Would your estimate of animals be more or less than 100?

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