This is an field trip and activity I do, that has minimal cost, but great punch! It focuses on the sixth grade ratios and proportions strand of the common core, especially unit rates. I do this activity after introducing unit rates. The students then take a field trip to a local grocery store and do a small scavenger hunt with unit rates, find unit rates, and discuss unit rates. They also get to purchase items if they want, and the following day their is an activity that goes along with finding the unit rate of their items. Included and editable: A letter to parents, Scavenger Hunt Activity, Unit Rate Problem Solving Chart, Mathematical Practices Sheet, Volunteer Instructions, and Guidelines or Rules for the trip.