Hi Grace. You may want to check with your state’s homeschooling laws. I have heard some states are very strict about what counts as a school day. I live in CA and the rules are very loose. Any instruction counts as a school day. As far as finishing 180 days of math etc. I think its safe to admit few homeschoolers really do 180 days of worksheets. The publishers put in enough to fulfill what is the typical number of days public schools would have. But even public school teachers dont finish the whole book. Most of the time the first and last several lessons are review which gives some wiggle room. We just plug along and dont worry if we start the next book in Sept or if it takes till Feb to move up, progress is the important thing. Until high school anyway, then things can get a little more formal and strict, depending on your state. I count field trips, educational video days, read aloud binges all as school days, even middle of the week camping trips, it all counts in my opinion.