Reaction Speed Ruler 3rd Grade Elementary School Math Teaching Tool
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Math Learning Tool for 3rd Grade Elementary School: Simple "Reaction Speed Ruler"
Catching the ruler
Catching a ruler by hand is one of the simplest methods to measure reaction speed.
Have someone hold the ruler, with the subject's hand placed approximately 20 centimeters from the bottom end of the ruler.
The person holding the ruler suddenly lets go, and the subject grasps the falling ruler as quickly as possible. Then, measure the distance the ruler fell. The shorter the distance, the faster the person's reaction time.
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