One year ago today an armed gunman stormed Robb Elementary School in Uvalde Texas killing 19 students and 2 teachers.

U.S. Secretary of Education Miguel Cardona used the anniversary of the tragedy to highlight improvements in school safety but also to call for stricter gun control measures.

“I am proud of the long overdue investments in school safety and mental health made possible by the Bipartisan Safer Communities Act, which President Biden signed into law last year. We as a nation, must do more,” said Cardona in a released statement. “Military-style weapons have turned far too many schools and communities into battlefields, and as President Biden has made clear, we need stronger, commonsense gun violence prevention laws.”

School shootings that have occurred since the Uvalde shooting have only intensified the conversation around the next steps. From gun control to armed guards, to even armed teachers, different school districts are grappling with the best way to curb school shootings.