Some Missouri school districts are using "smart thermometers" (provided by the school) and the Kinsa phone app to allow parents to track students’ illnesses and receive real-time guidance from school nurses to help cut down on the spread of flu and colds in classrooms. Using Bluetooth technology to sync the thermometer with their phones, parents are able to see reported symptoms of classmates to understand what illnesses are making the rounds. More than 45 districts in the state have adopted the technology.