Estimation

Learning Resource Type

Classroom Resource

Subject Area

Mathematics

Grade(s)

3

Overview

Students are asked to estimate time and numbers of objects in situations in which counting is not feasible or necessary. This CYBERCHASE activity is motivated by two sections of a Cyberchase episode: 1) In the For Real section, Harry is waiting in line for tickets and trying to estimate whether he has enough time to buy his tickets before the booth closes (based on the length of the line and the rate at which it is moving); and 2) In the animated portion of the same episode, Inez estimates whether she has enough jelly beans to decorate all of the cookies in a batch she is preparing.

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
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