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| Bar Graphs |
| Represent numbers of different things in a bar graph and you can compare values at a glance, communicate with others and even persuade them. |
| Representation
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The main Cybrary is under attack. Hacker, disguised as an exterminator called the Vermin Vexer, has released a mysterious cyberbug that is systematically destroying certain information -- but Ms. Fileshare, the overworked Cybrarian, is too busy to notice. When Hacker uses bar graphs to confuse Ms. Fileshare, the kids create bar graphs of their own to counter his contentions. Which graph will Ms. Fileshare believe? And what information is Hacker trying to destroy?
- Kid Synopsis |
When Harry Met Bianca
In their new jobs at a movie theater, Harry and Bianca compete to sell the most snacks at the concession stand. At first a comparison of bar graphs charting their sales suggests Harry has sold the most. However, when Bianca points out that the use of different scales on the graphs is misleading, she discovers that they both have sold the same amount, and both are worthy of the cherished title "Employee of the Month."
Math message: Bar graphs are useful when comparing numbers of different things visually. When you compare values from different graphs, make sure the scales are the same.
(RealPlayer Plugin Required) |
Bugs in the System
In this Web Activity, the player has to clear a room of bugs by clicking and dragging them onto a graph.
(Flash Plugin Required)
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Raising the Bar While Hogging the Ham (Radio, That Is)
Students learn about bar graphs and the importance of scale in persuading others before making their own bar graphs to argue their case.
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