The document describes an activity where students are split into groups and tasked with figuring out how to transport a group of adults and children across a river using a canoe that can carry either one adult or one to two children each trip. The narrator's group determines that the two children should make the first trip, followed by alternating trips of a child and adult to transport all 8 adults and 2 children across in 33 trips. They then solve a modified version with one less adult, requiring 29 trips. Finally, the students are asked to generate their own scenarios and discover the function is to multiply the number of adults by 4 and add 1 to determine the number of trips.