Buddy System is a fun and very challenging game that requires students to the play the fictional role of a teacher who must pair his or her students for field trip. "Pairs" must present "equal" terms. One is a proportion and one is a fraction. For example, a pair might be a student with 1/2 and another student with 2.4/4.8. To make it more fun, the "students" are historical figures and current celebrities. Very challenging!