It's hard to go anywhere these days and not see a defibrillator or meet someone who knows CPR.
But a Naples man says not enough people know how to treat open wounds, and he's trying to change that.
"The quickest, the most effective way to stop bleeding is to grab gauze, grab a towel, grab a sheet," said Ed d'Alessandro of the Cohort Group.
d'Alessandro, a former New York City Police officer, says seconds, not minutes matter when someone suffers a massive cut.
"In under three minutes from a femoral artery bleed the patient will expire."
The average EMS response time is about three minutes.
During the Parkland school shooting in February, wounded teachers and students were holed up inside their classrooms for several minutes until if was safe enough for help to arrive.
That's one reason why d'Alessandro brought the "Stop The Bleed" class to teachers at Seacrest Country Day School in case they find themselves having to save a life.
"My motto is get trained, get equipped, save a life."
d'Alessandro says whether it's a gunshot wound or a large cut, the sooner you stop the bleeding the better chance the patient has of surviving.
"If you have an open chest wound, air comes in and causes the lungs not to be able to function properly, by putting an airtight seal on it, we prevent it from happening," he said.
Seacrest teachers are being equiped with guaze, bandages and most importantly torniquets, which in certain situations can save a person from having their limbs amputated.
"We all learn differently, for me I need to touch, and feel and see and have something wrapped around my arm to walk away and understand," said Director of Enrolment Ryan Jobe.
He wants teachers and staff to be proactive if one of their students gets hurt.
"We talk a lot here at the beginning of the year, and kind of going through your head, if something were to happen, what's your action,"? Asked Jobe.
While the training is another tool to help save lives in the event of a mass shooting, it can be applied to almost any situation, from accidents at home, to car crashes, especially in remote places.
"Help is 20 minutes away, a half hour away, if you are lucky, if everything works out and they are not tied up somewhere else."
For information on taking the "Stop the Bleed" class Click Here.
