After a gunman opened fire on students in Parkland, Florida, the phones started ringing at the Texas Home School Coalition, and they haven't stopped yet.

The Lubbock-based organization has been swamped with inquiries for months from parents seeking safer options for their kids in the aftermath of this year's deadly school massacres, first in Parkland and then in Santa Fe, Texas.

"When the Parkland shooting happened, our phone calls and emails exploded," said coalition president Tim Lambert. "In the last couple of months, our numbers have doubled. We're dealing with probably between 1,200 and 1,400 calls and emails per month, and prior to that it was 600 to 700."