In Tucson, Ariz., where a gunman in January 2011 killed six and wounded 12 others, including U.S. Rep. Gabrielle Giffords, the largest school district in the state increased security after Friday's shooting. Tucson Unified School District spokeswoman Cara Rene said Sunday that the district was participating in a memorial being held at one of its schools on Sunday evening, and that Gifford's replacement, Rep. Ron Barber, would be a featured speaker along with Superintendent John Pedicone. Barber was with Giffords at the constituent meet-and-greet and was among the wounded.
Rene said planning was under way to help teachers and students with grief and fear issues when school resumes Monday, and the district was working with Tucson police on security issues.
Officials with Chicago Public Schools, the nation's third-largest school district, said the district is reiterating its existing safety and emergency-management plans to keep more than 400,000 students safe, and may deploy police or counselors to schools as needed.
"With this incident, we took it as an opportunity to remind all of our principals to review and refresh their individual emergency-management plans and remind staff of standard safety protocol," said Chief Safety and Security Officer Jadine Chou.
Many schools will be holding a moment of silence Monday and will fly flags at half-staff.
Meanwhile, at home, many parents were trying their best to allay their children's fears while coping with their own. Kornfeld said she drove her children to their elementary school over the weekend to show them that it was still safe and nothing had changed.
She said her family's Miami suburban community is a lot like Newtown, Conn., a place where people generally feel safe being at home without the doors locked and playing outside after school.
"Why would that happen there?" she said. "It kind of rocks everything."
Contributing to this report were Associated Press writers Jay Reeves in Birmingham, Ala.; Brett Zongker in Washington; Bob Christie in Phoenix; Holbrook Mohr in Jackson, Miss.; Amy Forliti in Minneapolis; Michelle Nealy in Chicago and Jeffrey Collins in Columbia, S.C.