ALEX | Alabama Learning Exchange

Calculating Elapsed Time

Classroom Resource Information

Title:

Calculating Elapsed Time

URL:

https://aptv.pbslearningmedia.org/resource/vtl07.math.measure.time.lpcalctime/calculating-elapsed-time/

Content Source:

PBS

Type:

Lesson/Unit Plan

Overview:

Students learn to figure out elapsed time by counting, subtracting, and regrouping in base 60. This activity is motivated by a Cyberchase episode in which Digit and Hacker compete in a cooking contest.

Content Standard(s):

Mathematics
MA2019 (2019)
Grade: 3

18. Tell and write time to the nearest minute; measure time intervals in minutes (within 90 minutes.)

a. Solve real-world problems involving addition and subtraction of time intervals in minutes by representing the problem on a number line diagram.

Unpacked Content

Evidence Of Student Attainment:

Students:

Tell and record time to the nearest minute using an analog clock.
Determine elapsed time using a number line.
Solve simple word problems using elapsed time in minutes (within 90 minutes) or hours.

Teacher Vocabulary:

Minute
Time interval
Number line diagram
Analog
Digital
Elapsed time
Half-hour
Quarter-hour

Knowledge:

Students know:

Conventions for time notation.
Time sequence patterns.
Strategies to determine elapsed time.

Skills:

Students are able to:

Accurately read and write time to the nearest minute from analog and digital clocks.
Measure time intervals in minutes.
Illustrate elapsed time using a number line.
Solve problems involving elapsed time in minutes (with 90 minutes) or hours.

Understanding:

Students understand that:

An analog clock is a whole partitioned into 60 parts and each part is one minute.
A number line can be partitioned to show time intervals in minutes.
A number line can be used to solve word problems that involve time intervals.

Diverse Learning Needs:

Essential Skills:

Learning Objectives:
M.3.18.1: Compare equivalent units of time using hours and minutes.
Examples: 60 minutes = one hour, 30 minutes = one half of an hour.
M.3.18.2: Recognize key vocabulary and/or phrases associated with time.
M.3.18.3: Compare the lengths of time to complete everyday activities.
M.3.18.4: Tell and write time in hours and half-hours using analog and digital clocks.
M.3.18.5: Recognize hour, minute, and second hands on an analog clock.
M.3.18.6: Count by 5's to 60.

Prior Knowledge Skills:

Write numerals 0 to 59.
Recognize numerals 0 to 59.
Count to 60 by fives.
Distinguish between analog and digital clocks.
Identify the short hand as the hour hand, and the long hand as the minute hand on an analog clock.
Identify the first number as the hour, and the numbers after the colon as the minutes on a digital clock.
Tell and write time in hours and half-hours using analog and digital clocks.
Recognize vocabulary terms related to time measurements.

Alabama Alternate Achievement Standards

AAS Standard:
M.AAS.3.18 Using vocalization, sign language, augmentative communication, or assistive technology, tell time on a digital clock (to the hour, half-hour, quarter hour).

Tags:

elapsed time, intervals of time, regrouping, time

License Type:

Custom Permission Type
See Terms: https://aptv.pbslearningmedia.org/help/terms-of-use/
For full descriptions of license types and a guide to usage, visit :
https://creativecommons.org/licenses

Accessibility

Comments

This resource provided by:

Author:

Stephanie Carver

ALEX Classroom Resource

Calculating Elapsed Time