Teacher Angela Hall always starts the day gathering her preschool students in a circle in their Shreveport, Louisiana, classroom. The kids giggle. They share. And they look for who’s missing. “Braylon, he’s not here,” she recalled one of her students saying Monday. Braylon Snow, who just turned 5, was one of seven siblings who were fatally shot Sunday by their father in an attack that also killed their cousin. The shooting rattled classrooms in Shreveport where teachers like Hall on Monday came