ARI SHAPIRO, HOST: Door-to-door pitches might come from a political campaign or a religious group. Well, in Austin, Texas, the folks knocking on doors include representatives from the public schools. Like many places, the Austin Independent School District saw a jump in unenrollments last year during the pandemic, about 5,000 students. So folks there are knocking on doors to talk to parents about registering their children for in-person school this fall. Alejandro Delgado is enrollment director for the Austin Independent School District in Texas. Welcome to ALL THINGS CONSIDERED. ALEJANDRO DELGADO: Thank you for having me, Ari. SHAPIRO: So tell us about this door-to-door campaign. How does it work exactly?