Sounds like an incredibly complicated system. I can't imagine being the parent having to keep track of what days your child goes, especially if a school closure means the weeks can completely swap.
We get a school day calendar so we just keep track of what school day it is and what school day we follow for our child - 1, 3 & 5 or 2, 4, & 6. I prefer it better then all mornings all week or all afternoons. Not everyone can arrange pickup/drop off at lunchtime.
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