Measurement

Lesson 2

Math

Unit 7

3rd Grade

Lesson 2 of 12

Objective


Tell time to the minute before the hour.

Common Core Standards


Core Standards

  • 3.MD.A.1 — Tell and write time to the nearest minute and measure time intervals in minutes. Solve word problems involving addition and subtraction of time intervals in minutes, e.g., by representing the problem on a number line diagram.

Foundational Standards

  • 2.MD.C.7

Criteria for Success


  1. Understand the equivalence of the standard form of time (e.g., 4:48) and the time given before the next hour (e.g., twelve minutes to 5). 
  2. Determine the time in standard form when given the time in minutes before the hour. 
  3. Determine the time in minutes before the hour when given the time in standard form. 

Tips for Teachers


  • While Lesson 2’s objective is not explicitly part of 3.MD.1, it will help students determine elapsed time much more easily. For example, if they need to determine what time a 41-minute event that started at 5:38 ends, they may decide to find the number of minutes to the next hour, or 22, and then count forward another 19 minutes to 6:19. 
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Anchor Tasks

25-30 minutes


Problem 1

Mr. Wynn was enjoying teaching the fourth graders and he lost track of time. When he looked at the clock, pictured below, he exclaimed, “Oh my gosh, it’s already 5 till 3!” Angelica says, “That’s not what time it is. It’s 2:55.” Who is correct, Mr. Wynn or Angelica? Explain how you know.

Guiding Questions

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Student Response

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Problem 2

Determine the time. 

a.   10 minutes before 4

b.   Quarter to noon

Guiding Questions

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Student Response

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Problem 3

Determine the time to the minute before the hour. 

a.   9:52

b.   5:43

Guiding Questions

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Student Response

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Problem Set

15-20 minutes


Discussion of Problem Set

  • How can a clock help you convert back and forth between standard time and time to the next hour?
  • Where there particular hours that were more difficult to figure out than others? 
  • What’s tricky about subtraction from an hour? How is that different from other units we’re used to, like a ten or a hundred?

Target Task

5-10 minutes


Problem 1

Determine the time to the minute before the hour. Phrase your answer as “___ minutes to ___.”

a.     7:48

b.     5:32

Student Response

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Problem 2

Determine the time. Write it in standard form. 

a.   Four minutes until 5

b.   26 minutes till midnight

Student Response

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Additional Practice


The Extra Practice Problems can be used as additional practice for homework, during an intervention block, etc. Daily Word Problems and Fluency Activities are aligned to the content of the unit but not necessarily to the lesson objective, therefore feel free to use them anytime during your school day.

Word Problems and Fluency Activities

Word Problems and Fluency Activities

Help students strengthen their application and fluency skills with daily word problem practice and content-aligned fluency activities.

Next

Relate clocks to number lines.

Lesson 3
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Lesson Map

A7CB09C2-D12F-4F55-80DB-37298FF0A765

Topic A: Time Measurement

Topic B: Mass and Liquid Volume Measurement

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