Set up the activity outside or inside. Students follow the trail by following the footprints, and writing the start time on the clock at each cone. Then they proceed to the elapsed time and do the activity with a timer. After they complete the activity, they find the end time. Halfway through, they do the same thing, but this time they write the end time and they have to find the start time. There are 10 problems. Student recording sheet is included, as well as, the teacher answer sheet.