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Instructor Overview

In this lesson, students watch a video of a runner and express his speed as a rate in meters per second. Students then use the rate to determine how long it takes the runner to go any distance.

Key Concepts

Speed is a rate that is expressed as distance traveled per unit of time. Miles per hour, laps per minute, and meters per second are all examples of units for speed. The measures of speed, distance, and time are all related. The relationship can be expressed in three ways: d = rt, r = dt, t = dr.

Goals and Learning Objectives

  • Explore speed as a rate that measures the relationship between two aspects of a situation: distance and time.
  • In comparing distance, speed, and time, understand how to use any two of these measures to find the third measure.