Lesson 1

Time to the Nearest Five Minutes

Est. Class Sessions: 1

Summarizing the Lesson

Conclude the lesson by playing another round of the I Have, Who Has Game. This time, challenge the class to try to play a little faster than the first round played in the beginning of the lesson. After you distribute the cards, give students time to read the time shown on them. Again, record the time the game begins on the board. When the round is complete, record the end time. Model the start time on your demonstration clock and slowly move the minute hand as you count the minutes elapsed aloud for the class. Record the total time it took for the class to play Round 2 and compare the times. See Figure 5.

The times shown in the I Have, Who Has Game are to the nearest fifteen minutes. Help students see that they can use these times to help them read other times to the nearest five minutes.

Ask:

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  • How does knowing 4:00 on the clock help you know 4:05? (Possible response: I know that at 4:00, the minute hand will be pointing directly at the top of the clock. Then I just count on 5 minutes to get to 4:05.)
  • How does knowing 4:15 on the clock help you know 4:20? (Possible response: I know what the clockface looks like at 4:15. When it shows 4:20, I don't have to begin counting the minutes back at 0. I just start at 4:15 and count on 5 minutes to 4:20.)
  • How does knowing 4:30 on the clock help you know 4:35? 4:25? (Possible response: You can think about what 4:30 looks like and then count on 5 minutes for 4:35 or count back 5 minutes for 4:25.)
  • How does knowing 4:45 on the clock help you know 4:50? 4:40? (Possible response: The minute hand for 4:50 will be 5 minutes past 4:45 and the minute hand for 4:40 will be 5 minutes before 4:45.)
Adventure Book:
Student Activity Book:
Master:
Sample recording of game times
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