Courtesy Andrea Burns(NEW YORK) Nearly a decade since a mass shooting at Sandy Hook Elementary School in Newtown, Connecticut, in 2012, cut the lives of 20 children and six adults short, American families, parents, caregivers, teachers, and school staffers are grappling with yet another mass shooting. This week, it happened at Robb Elementary School in Uvalde, Texas, and at least 19 children and two adults died in the aftermath. It's a subject Andrea Burns has talked about with her fourth grade classes for the last eight years at an elementary school in Kansas City, Kansas. Burns stepped aside from teaching this year, but she recalls how she and other teachers at her former school would conduct intruder drills with students regularly. She told Good Morning America that she wouldn't shy away from speaking about a topic such as a school shooting when it was appropriate and timely. "I'm very up front with my students, even if they're in fourth grade. I'm li