Learning goals: Teacher Facing Compare wheels of different sizes and explain (orally) why a larger wheel needs fewer rotations to travel the same distance. Generalize that the distance a wheel rolls in one rotation is equal to the circumference of the wheel. Write an equation to represent the proportional relationship between the number of rotations and the distance a wheel travels. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 7.3 Measuring Circles, Grade 7.