CYS teams participate in a travel league called BAYS (Boston Area Youth Soccer) for players in grades 3-8. For this program, we try to "level" our teams so that players are playing with teammates at their own level, and they play against teams that are appropriately leveled from other cities and towns. Our travel teams have two-year age groups, therefore, teams automatically change every year.
Our teams have two-year age groups, with 3rd and 4th graders playing together, 5th and 6th playing together, and 7th and 8th playing together. Therefore, teams change every year.
Cambridge Teams in BAYS - https://bays.org/bays/organizations/view/CAM