a group of children that walk to school together under the supervision of trained adults and along a pre-arranged 'safe route'
a group of children walking to school escorted by two or more designated adults
a group of children, walking to school with a couple of parent volunteers - a 'driver', who leads the way, and a 'conductor' at the rear
a group of school children walking to school under adult supervision, following a set route with a timetable of stops like a real bus
a line of children walking in pairs to school with an adult 'driver' at the front and a 'conductor' at the back
a safe, healthy way for children to get to school, walking hand in hand in a crocodile line, supervised by adults, often wearing fluorescent clothing to ensure they are clearly seen by drivers
A walking bus is a group of schoolchildren who, chaperoned by two adults (a "Driver" leads and a "conductor" follows) walk to school, in much the same way a school bus would drive them to school. Like a traditional bus, walking buses have a fixed route with designated "bus stops" and "pick up times" in which they pick up children. Walking Buses are popular in the United Kingdom and have recently gained a level of popularity in the United States.
