This is a cooperative learning activity for groups of two to create and solve their own systems of equations word problem based on the theme of going on a trip. Variables would be the cost of the trip and the number of nights or days. Teacher's initials are required after the first step to make sure the problem is reasonable (make sure the lower flight cost has a higher cost per night). Students then compare costs using a table and by writing and solving equations. Finally, they need to make a poster showing all work which can be presented to the class. The sheet is designed to be cut in half.