#29 Worrying too much about "holes"...
It's a thought that keeps homeschooling parents up at night-- what if there's some crucial piece of information we forget to teach? Will our kids' future be ruined because we never taught them about semi-colons, or Mayan history?
There's no such thing as a "complete education"-- every curriculum, formal or improvised, includes some things, and leaves other things out. The good news is that it's never too late to learn new things! If it becomes clear that there's something they need to know that they might have learned years earlier, you can rest assured that they will learn the topic more easily than they would have when they were younger.