In this activity students return to the context of designing a 5K walk-a-thon that was introduced in an earlier lesson. They use a map or satellite image of the school grounds to decide where the path of the 5K course could be and estimate how many laps it would take to complete 5 kilometers. Ideally, one lap should be about 500 meters because in the next activity, students will use their trundle wheels to measure the course they have designed. Students can use their knowledge of the smaller path they measured to help them design their course (MP7).

If possible, each group chooses their own course to help them take ownership of their work and for a greater variety of solutions. Alternatively, the whole class can come to an agreement on one path in order to streamline the process if time is limited.