STANDARDS

CCSS: 3.MD.A.1, MP2, MP5, MP6

TEKS: 3.7C, 4.8C

 

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Lesson: Home-Learning Successes!

Objective: Students will use number lines to calculate the elapsed time between events on an e-learning class schedule.

Vocabulary

  • Increment: a change in value of a quantity
  • Analog clock: a clock that represents time by the position of its moving hands

Lesson Plan

    Spark Engagement.

Play or share the video “Voices From Quarantine.” Then, before or after reading the article, spark a discussion based on the following questions:

  • How is virtual learning different from in-person learning?
  • Why are schedules important? Explain.
  • Make a list of activities you enjoy. Record how much time you spend doing each activity.

    Introduce the math concept and vocabulary.

  • Look at an analog clock or watch and describe its features. Which features help you tell the time? (Possible answers: the numbers, the minute and hour hands)
  • What is the current time? How do you know? (Answers will vary.)
  • What time will it be 5 minutes later? What time will it be an hour later? (Answers will vary.)
  • How might you determine how much time has passed between the start and the end of one activity? (Possible answers: use a stopwatch; count the hours/minutes between each time; find the difference in time)
  • A number line is a tool we can use to find the amount of time that passes, known as elapsed time.

    Work through the "What to Do" box.

  • What time does the clock read? (11:50 a.m.) How do you know? (Answers will vary.)
  • What are some ways you can express this time in words? (10 minutes till noon/12, 50 minutes after 11, 10 to 12)
  • Why did the first increment in the number line move 10 minutes? (10 minutes gets you to the next hour, 12:00)
  • How would calculating elapsed time help you before or after school? (Answers will vary.)

    Reinforce with math practice.

Have students complete problems 1 through 4 on page 5 of the article.

Teacher's Tip

Use the mountains, hills, and rocks method to show elapsed time on a number line. Here is the key: Mountain—1 hour; Hill—30, 25, 20, 15, 10, or 5 minutes; Rock—1 minute. This helps students break up the time increments and gives them a strong visual representation.

—Jennifer Mitchell, UT Tyler University Academy at Longview, TX

Differentiate & Extend

Skills Sheets: Level Down: Telling Time (3.MD.A.1, 2.MD.C.7) | On Level: DynaDash: Finding Elapsed Time (3.MD.A.1) | Level Up: Understanding Time Zones (3.MD.A.1)

Game: Time for Pets

SEL (Social-emotional learning activity/prompt): Discuss the advantages and disadvantages of learning from home. Then have students write about a time they overcame an obstacle or adversity.

DynaMath@Home: Have students list at least 5 defined activity blocks in their day (e.g., outdoor play—25 minutes). Then have them choose a start time and determine at what time each activity starts and ends.

Download a printable PDF of this lesson plan.

Share an interactive Google Slides version of this lesson with your students.

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