Calculating Elapsed Time

Learning Resource Type

Classroom Resource

Subject Area

Mathematics

Grade(s)

3

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.

Mathematics (2019) Grade(s): 3

MA19.3.18

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

UP:MA19.3.18

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.

CR Resource Type

Lesson/Unit Plan

Resource Provider

PBS

License Type

CUSTOM
ALSDE LOGO