Method
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Use the
marker to label the beans to match this picture. Click to view,
press the 'back' button on your browser to return to this page.
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Cut a hole
in the top of the juice box small enough so that only one bean
can go through it at a time.
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bean graph Click for a printable bean graph, press 'back' in
your browser to return to this page. Or, ask each student pair
to draw a bean graph like the example provided.
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Put 12
beans in the box. Shake the box until two beans come out. Add
the numbers oon the beans together. Mark an X on the graph above
the total of the two beans
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Put the two
beans back in the box. Shake two more out, and mark their total
on the graph. Repeat this until you have 10 X's on the graph.
Take a look at the graph. Is there a pattern in the numbers? Do
any of them appear more than once?
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Now shake
out and total beans until you have 20 X's on the graph. What
does the graph look like now?
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Shake and
total beans until you have 30 X's on the graph. Then compare the
graph with others' in the class.
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Ask
students to respond to these questions:
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Do the
graphs look alike or different?
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Which
numbers seem to appear most often?
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Which
numbers seem to appear least often?
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Why
might this be so?
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What
might the graphs look like with 50 X's? Try it.
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Do you
think the bean game is fair or unfair? Why do you think so?
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