Who knew that you could measure time with a ruler? This great printable resource allows young mathematicians to visualize the hours of the day as they learn to calculate elapsed time.

Concepts

elapsed time, hours, minutes, time intervals, measurement

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Additional Tags

math

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Instructional Ideas

• Provide this resource to students at the beginning of a lesson series on time, allowing them to use it as a reference when solving in-class and homework assignments
• Have students hold the ends of the ruler together to demonstrate the cyclic nature of time

Classroom Considerations

• Elapsed time rulers may be difficult for younger children to correctly assemble
• Create a laminated set of these rulers to use year after year when teaching how to calculate elapsed time

Pros

• Resource allows students to calculate elapsed time to the nearest half hour
• The terms midnight and noon are used to distinguish 12 a.m. from 12 p.m.

Cons

• None

Common Core

3.MD.A.1 4.MD.A.2 MP4 MP7