Learning goals: Teacher Facing Calculate the distance of a path using the circumference and number of rotations of a trundle wheel. Create a scale drawing of a 5K course and present (using words and other representations) the map and course details. Use proportional reasoning to calculate the number of laps of a course that is equal to 5 kilometers. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 7.9 Putting it All Together, Grade 7.