An Illinois school district is using a portion of a $15,000 grant from Fuel Up to Play 60 to purchase 60 wristbands made by Fitbit Flex that will track students' steps taken, distance traveled, calories burned, active minutes, hours slept and the quality of sleep. The effort is intended to help reduce teenage obesity, and officials said students will take the wristbands home for several days and potentially use the data to make healthier choices.