Strength of schedule is calculated from the opponents projected fantasy points allowed for the RB position. The best rating is +16 which gives the player the advantage against the defense and indicates an easy opponent, the worst rating is -16 which gives the defense the advantage and indicates a tough opponent.
Kuhn is valuable to Green Bay's offense but if he's on your fantasy team and you find yourself yelling "Kuhn," you're most likely wearing a piece of cheese on your head. Kuhn only has 51 touches and two scores over the last two seasons. He's not a fantasy option.