I haven't done a 4 day program, but my thoughts are that I'm going to continue the way I am now. We do school daily, and in between guides we do something else for "fun" a unit study or two. Between field trip days, days we just don't feel like doing school (sick, too beautiful outside, birthdays, whatever) our "breaks", and when we go out of town, there's not too many more days left to fill

I'm actually looking forward to a 4 day week program so that we'll have more time to do extra stuff!