A close relative of mine is a social worker and school therapist for two elementary schools. She says...:
I heard the same theme at my schools that they didn’t discuss it unless students brought it up. That makes sense to me to let the child take the lead. We, as adults, process grief and loss differently than children do. It’s my understanding that teachers talked to students on a one to one basis if it was brought up. Not discussing it as a whole school makes sense because who knows what parents discussed with their children and exposed them to. Both principals stated there weren’t too many conversations about it. It’s “normal” for parents to keep students out of school after something like this. They may wait for the buzz to die down or they are worried about their child’s safety.
Schools practice lock downs and he should know what to do. I think what the child needs to hear is their teachers and school staff number job is to keep them safe and that there are some bad people in the world and they do bad things.
Hope that helps?