Well, this may or not be great. I just developed this method today. Tomorrow is the first day of Arts & History Academy for dd so we will not be able to "do school" on Tuesdays. (We also have lots of extra activities on Tuesday afternoons.) So I added an extra day of Math and Storytime today. I will add 2 extra boxes each day so that we can complete 5 days in 4. In order to keep track of what I am doing, I used the removable/restickable tabs and made 4 - one for each extra set of boxes, Math & Storytime, History and Poetry, SAGH (Science, Art, Geography, History Tmeline) and Bible Study, and Lang. Arts & Reading. I have 3 tabs on Unit 2-Day 2 and Math & Storytime on Unit2-Day3. I will continue to move the tabs as we proceed so that I will know which day of the 4 sets of boxes we are working on.
Okay that was a bit long and possibly confusing. I think it will work. We shall see.
The good news is that if we are not able to add extra boxes and we don't complete a unit in a week, it is absolutely ok.
Judy