There is no normal calendar that works that way. It is essentially an eight-day week. Was this schedule developed by the same folks that dreamed up Common Core?
You could set a Repeating event called WD1, WD2, etc that repeats every 8 days. Set them to repeat until end of school year.
What do they do about holidays. Do they lose a work day, or does it just occur on the next allowable work day?
If that is the case, you'd have to break the repeat on the holiday, then start new repeating events after the holiday.
Also, you'll have to interrupt it for whatever they determine to be the weekend. Once you get the basic workweek set up in Calendar, you could then copy each event and paste into the next start date for that sequence. Still a PITA.
Does the school publish a shared calendar? They should. Everyone could subscribe to it and see which days are what based on that calendar.