## Open Number Line Example: if an activity starts 9 a.m. and ends at 1 p.m. - Section 2: Direct Instruction: Open Number Line Intro with Hours

Open Number Line Example: if an activity starts 9 a.m. and ends at 1 p.m.

# Using Open Number Lines to Determine Elapsed Time

Unit 6: Time
Lesson 5 of 11

## Big Idea: Open number lines are a versatile and simple mental model for measuring elapsed time. This lesson develops students' analog knowledge using the skills they are close to mastering.

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11 teachers like this lesson
Standards:
Subject(s):
Math, Number Sense and Operations, telling time, elapsed time, time
63 minutes

### Jennifer Valentine

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