Do you think that bubbles are completely pointless in school.
I work in a school and some of the staff are being used in more than one, some in all of them briefly. Siblings are in separate bubbles during the day and then go home, mingle and then go back to their bubbles.
I'm not really saying that there's a better way. I know staff are in short supply as are the necessary funds or space. But then why bother having bubbles at all.