Speed is the rate of change of the position of a moving body.
In math and science, speed tells us how fast something is moving. It measures how far something travels over a certain amount of time. We usually calculate speed by dividing the distance travelled by the time it took to get there.
Speed = Distance ÷ Time
For example, if we ride our bikes for 10 miles in 2 hours, our speed is:
10 miles ÷ 2 hours = 5 miles per hour
Speed is often measured in units like:
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Miles per hour (mph)
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Kilometers per hour (km/h)
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Meters per second (m/s)
Understanding speed helps us describe movement in the real world, like how fast a car is going, how quickly an athlete runs, or how long it will take to reach a destination.
When Do Students Learn About Speed?
Students are introduced to the idea of speed through word problems, charts, and graphs that explore relationships between distance, time, and rate.
Grades 4–5 – Introduction to Speed
Students begin solving problems involving simple rates and learn the formula for speed.
Grades 6+ – Applying Speed in Word Problems and Graphs
Students use the speed formula in algebra and science, and they explore how speed connects with slope and rate of change.
