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You Pour, I Choose

24
skips
76
questions

Act One

• Dan Meyer

January 30, 2012

Does the left have more soda? Does the right have more soda? Do they have exactly the same amount of soda?

• Teacher note
Have students write down a guess and share it with their neighbors. Then you should take a poll of the glass. Who thinks left? Who thinks right? Who thinks the same?

Act Two

• 1.

What information will you need here?

• Teacher note
No question is too small or too picky or too precise. Just write it all down next to student names. If a student says, "We need to know how thick the glass is," give a lot of status to that kid for identifying variables with such precision.

You'll want to stage a fight over radius, circumference, and diameter. Which is easiest to measure? Why? How would you do it.

Then give the measurements you brought with you.
• ImageMeasurements
• Teacher note
In one version of this problem it was useful to cover up all the measurements but one and ask the students to estimate the other quantities.

Act Three

Sequel

• 2.

What would the heights look like if each glass had exactly the same amount of Coke?

• 3.

"All you have to do is multiply the radius and height on both cylinders and compare them," someone told me. Is she right?