It was the nation's renewed anxiety, after 17 people were killed at Marjory Stoneman Douglas High in February, that had drawn so many administrators to the National School Safety Conference at the Florida hotel, 200 miles north of Parkland.
The students know the ability to see color is extra special for Henderson, who has dedicated his life to theater. "
This is something Henderson has never been able to do before, so when his students gave him this gift, he was speechless.
The schools that have experienced gun violence consistently cited simple, well-established safety measures as most effective at minimizing harm: drills that teach rapid lockdown and evacuation strategies, doors that can be secured in seconds and resource officers, or other adults, who act quickly.
People died in the shooting at Marjory Stoneman Douglas High School because the school failed to implement a simple security measure that had been recommended twice to teachers and administrators, according to testimony Wednesday at a meeting of the state commission investigating the massacre.
Teacher Tyler Henderson, who is colorblind, is currently directing Lee High School's production of "Joseph and the Amazing Technicolor Dreamcoat."
Students buy colorblind teacher special glasses so he can see color for the first time
The new glasses added brightness to Henderson's experience, but it's the students who really light up his world.
Although school security has grown into a $2.7 billion market - an estimate that does not account for the billions more spent on armed campus police officers - little research has been done on which safety measures do and do not protect students from gun violence.
Heartwarming moment Alabama students surprise colorblind drama teacher with corrective glasses
Standing on stage, Henderson read a touching letter from his students, and was handed the enchroma glasses.
How the weapon got into Huffman remains unclear - Arrington's family has sued the district, limiting what administrators can say - but the incident highlights a theme that appears throughout the survey responses: No amount of investment in security can guarantee a school protection from gun violence.