When your kids love to learn, then learning never stops. That means that you can actually step away from all the demands of homeschooling for two or three weeks around Christmas and your kids will be just fine. Let them spend hours playing with Legos. Let them spend hours reading any book they want. (That you approve of!) Let them get lost in writing a story for hours on end. Let them play outside and dig holes. Everything a child does is learning. Let them spend some extra time this month learning in the way that is most meaningful to them then acknowledge to yourself that you have done a good thing by not teaching them at all.