I used to resent these interruptions and get frustrated because they ruined my agenda. But then a few years ago I happened upon this quote and my whole perspective was turned around.
It is my desire that I never get to the point where I think that homeschooling is about me or about the children. Interruptions are one of the tools God uses to humble me and make me realize who is really in charge and who this is all for.
I think I find most help in trying to look on all the interruptions and hindrances to work that one has planned out for oneself as discipline, trials sent by God to help one against getting selfish over one's work. Then one can feel that perhaps one's true work - one's work for God - consists in doing some trifling haphazard thing that has been thrown into one's day. It is not a waste of time, as one is tempted to think, it is the most imortant part of the work of the day - the part one can best offer to God. After such a hindrance, do not rush after the planned work, trust that the time to finish it will be given sometime, and keep a quiet heart about it.
Annie Keary 1825-1879