I have this resource printed and displayed in my classroom.
Students are allocated teams as part of a seating plan - they are each given a number 1-4. Each number is then allocated a role.
Teams move tables each lesson (indicated by a box with their team name on it).
Teams are re-organised every half term.
Roles and numbers are also changed half termly - as many students may retain the same number but in a different team!
Hope that all makes sense. I will probably put together a help sheet to go with this resource at some point.
Please let me know how useful you find these.