Even as recently as 1980, home schooling was illegal in a majority of states—and didn’t become lawful nationwide until 1993. But once seen as a fringe practice of families on the extreme right and left—religious conservatives and hippies—homeschooling today is viewed as a small, but integral part of the education ecosystem in the United States and a pillar of the school choice movement. Home schooling has gained wider attention and more-mainstream acceptance as the numbers of students learning at home doubled in the past decade—a trend driven in some measure by the expansion of online schooling options.