There's been no real reduction in the number of U.S. school shootings despite increased security put in place after the rampage at Connecticut's Sandy Hook Elementary School in December 2012.
In Pennsylvania and New Mexico, Colorado and Tennessee, and elsewhere, gunfire has echoed through school hallways, and killed students or their teachers in some cases. "Lockdown" is now part of the school vocabulary.
An Associated Press analysis finds that there have been at least 11 school shootings this academic year alone, in addition to other cases of gun violence, in school parking lots and elsewhere on campus, when classes were not in session.
Last August, for example, a gun discharged in a 5-year-old's backpack while students were waiting for the opening bell in the cafeteria at Westside Elementary School in Memphis. No one was hurt.
Experts say the rate of school shootings is statistically unchanged since the mid- to late-1990s, yet still remains troubling.
Ronald Stephens, executive director of the National School Safety Center, said there have been about 500 school-associated violent deaths in the past 20 years.
The numbers don't include a string of recent shootings at colleges and universities. Just last week, a man was shot and critically wounded at the Palm Bay Campus of Eastern Florida State College, according to police.