I remember before hitting Middle School (maybe in 5th or 6th grade?) my elementary school rotated the classes in groups of three throughout each day as a way to

I remember before hitting Middle School (maybe in 5th or 6th grade?) my elementary school rotated the classes in groups of three throughout each day as a way to transition to Middle School's much larger un-grouped class transition. By example: Teachers A, B, C, D, E, and F were teachers of that grade. Classes 1, 2, 3, 4, 5, and 6 were classes of that grade. Before lunch the teacher+class pairings were A1, B2, C3, D4, E5, F6. After lunch the pairings were A2, B3, C1, D5, E6, F4. After a break the pairings were A3, B1, C2, D6, E4, F5. This allowed us to get used to the idea of rotating teachers and we interacted with the other classes in our group a bit during rotations and breaks. However, it only raised the number of teachers to interact with by two, and we didn't actually sit and learn with a larger class. It made for a great transition. That school had a bunch of other really great opportunities to start giving children more responsibilities, too. It had an inter-school mail system run by the students, as well as a bookstore, snack stand, and a few other things. For context, this was in the USA in the early 2000s.