As a grassroots, volunteer-based organization that connects homeschoolers across the state, the Maryland Homeschool Association has been tracking data collected by the state education department on homeschooling rates for nearly 20 years. It always tended to fluctuate seemingly randomly, said founder Alessa Keener, never changing by more than 9%.

“Some years, it goes down. Some years, it goes up,” she said. “There’s never really been, I think, a good explanation [as to] why.”