Most parents are still not yet sure whether their children will be attending school in person this fall. So, some have decided to take matters into their own hands and create their own kind of school — a sort of microschool that relies on traditional homeschooling techniques.

In the past three weeks alone, the National Home School Association has referred about 3,000 parents to local homeschooling groups, according to the organization’s executive director, J. Allen Weston. That’s a significant number, Weston told the Wall Street Journal, and it will very likely continue to grow over the next few months. Right now, about 4 million K-12 students are homeschooled, he said. By the end of this year, Weston believes that number will rise to at least 10 million.