During the listening session Trump, along with Vice President Mike Pence and Education Secretary Betsy DeVos fielded ideas and statements from a number of attendees.
Seventeen people were shot and killed at Stoneman Douglas High School in Parkland, Florida Wednesday February 14, 2018.
He said: "This would only be obviously for people who are very adept at handling a gun".
"We are going to do something about this disgusting situation that is going on", Trump said.
But not all agreed with that approach.
Bump stock devices were not used in the Florida school shooting but it became controversial after the Las Vegas mass shooting in October previous year in which the gunman used the device and killed almost 60 people.
Nicole Hockley, whose 6-year-old son was killed at Sandy Hook, called for mental health services to identify individuals with a lack of "mental wellness", which she said is characterized by anger and fear, and can't be diagnosed. "If you do this, and a lot of people are talking about it, and it's certainly a point that we'll discuss, but concealed-carry for teachers and for people of talent, of that type of talent".
American Federation of Teachers President Randi Weingarten condemned the proposal.
"It's time for politicians to value children over the gun lobby". We need more than just regulations - we need to make this the law.
During a powerful and heart-breaking session, survivors and family members stood up and called on U.S. politicians to come up with solutions to gun violence.
They were welcomed into the gun-friendly halls of power, but the students' top goal - a ban on assault-style rifles such as the weapon used in the massacre - was taken off the table a day earlier, although more limited measures were still possible. "Parents and educators overwhelmingly reject the idea of arming school staff". "The laws of the country have failed".
But his suggestion of arming teachers drew scorn from some. "It's eternity", Pollack said. He helped restrain an active shooter who wounded two students at a Colorado middle school in 2010.
Later that month he said, "I don't want to have guns in classrooms, although in some cases teachers should have guns in classrooms, frankly". Pretty bad ethical dilemma to put somebody in.
Outside the building, the crowd burst into chants of "Vote them out" as speakers called for the removal of Republican lawmakers who refuse to address gun control issues. It's been many, many years, and there have been no solutions.
Singer-songwriter John Legend, a frequent Trump critic, also chimed in.
We pay for your stories! I walked in today - they had a security guard in the elevator.
"She was murdered last week and she was taken from us - shot nine times on the third floor. I'm not going to sleep until it gets fixed".
"If you had a teacher who was adept at firearms, they could very well end the attack very quickly", Trump said, suggesting that 20 percent of teachers at a given school could be trained to carry concealed weapons. He said a gun free zone, to a maniac, is "Let's go in and let's attack".