How do computers sort data lists? Using eight unknown weights and a balance scale, groups determine the order of the weights from lightest to heaviest. A second worksheet provides the groups with other methods to order the weights. The groups determine which method is the fastest, which also requires the least number of comparisons.

Concepts

sorting, computer code, computers, algorithms

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Additional Tags

math

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Instructional Ideas

• Brainstorm ways to sort the weights and calculate the number of comparisons that would be needed to do each method
• For younger classes, limit the number of containers that need to be sorted

Classroom Considerations

• Prepare the containers with sand prior to the start of the lesson for younger classes

Pros

• The lesson provides an active way to explain how a computer sorts data
• The answer key not only provides answers but also gives hints on how to determine the order

Cons

• The lesson does not contain a method in which to check for understanding

Common Core

3.MD.A.2 MP1 MP5