Differentiation TechniqueFuzzy Problems

We're supposed to rank fifteen items according to usefulness if we were stranded on the light-side of the moon. The items range from pistols to powdered milk. Some seem useful, but are actually worthless while others seem unnecessary on earth, but are actually vital when stuck on the moon. However, the structure of the activity as a website is not optimal. Let's improve this and make it an awesome problem–solving exercise for our class.