""Let"s test who"s the fastest runner! . . what about the fastest walker? Formulae can help answer these questions and calculate how close you are to setting a Marathon World Record!’Who"s the fastest in the class? How do we know? What does "fastest" mean exactly? Discuss this as a class. How might find out, right now, who"s fastest . . . ?An outside running race (or inside walking race if it"s raining!), two people...