Why is it so Hard to get back into the "Groove"?

I wonder why is it so hard to get back into the groove of things after a holiday? We only took yesterday off, but it seems that my youngest is having a hard time doing her school work today. Right now, she is washing the table to finish her school work, but she is taking her time, and playing. I would like them to be done in a little while, but that seems unlikely! I do pray that tomorrow is better.

Edit:
Have you just had one of those days??? No today was not better than yesterday. It took 2 hrs. for math and it was easy. lol Praying that the rest of the week is better.