Santa Fe Public Schools Superintendent Veronica Garcia said Monday that families will be allowed to opt out of the video after some parents expressed concern about potentially traumatic effects of the training itself.

She says the video was posted on the school district website so that parents could review it first before children watch it.

It follows a “run, hide, fight” security strategy supported by a national police association and the Department of Homeland Security. Garcia said the Santa Fe school board shunned other videos that portray gunmen on school grounds and developed its own.