While an investigation continued at the school Monday, moving trucks arrived to take supplies and equipment to Chalk Hill Elementary in the neighboring town of Monroe, where authorities have said students from Sandy Hook will resume their studies.
But it's unclear when classes will start again for the school's students. On Monday, Newtown Police Lt. George Sinko said classes for Sandy Hook's students would remain suspended "until further notice."
Obama: "These tragedies must end"
In Newtown High School's packed auditorium on Sunday, President Barack Obama offered his condolences, recited the names of the children slain at Sandy Hook and pledged to work toward stopping such shootings in the future.
"In the coming weeks, I will use whatever power this office holds to engage my fellow citizens -- from law enforcement to mental health professionals, to parents and educators -- in an effort aimed at preventing more tragedies like this," he said.
The president didn't mention specific steps he would take, but he said the country has failed to do everything it can to protect youths from such immense tragedy.
"Can we honestly say we're doing enough to keep our children -- all of them -- safe from harm?" he said, adding that "if we don't get that right, we don't get anything right."
"If we're honest with ourselves, the answer is no."
Obama said it was the fourth time he's seen a community torn apart by a mass shooting during his presidency: Tucson, Aurora, Oak Creek, and now, Newtown.
"These tragedies must end," he said. "And to end them, we must change."
Shooting sparks reactions nationwide
The tragic shooting has touched nerves nationwide, with some holding vigils and building makeshift memorials to support the victims and others calling for political action.
Participants in a candlelight vigil in New York City passed around a petition calling for greater gun control, Joe Josephs told CNN's iReport.
John Licata told CNN's iReport that the need for better vetting before people buy guns is clear, and authorities need to take things a step further.
"We have to get our public officials to do something about this," he said. "One of those issues is banning assault weapons. ... I am a believer in the Second Amendment, but there has to be a ban."
Others said more guns were needed.
Jameson Riley told CNN's iReport that the shooting shows the need for more armed guards in schools. Riley, a gun owner, said that the recent mass shootings have made him consider getting a concealed weapon permit.
"I would absolutely carry a concealed weapon. I have a 2-year-old daughter, and she is the light of my life. And I would like to protect her," he said. "It is horrible to think that we have come to a path where this is necessary, but I think it is fixable."
Relatives carry on the victims' voices
As more details about the 20 children and six educators emerge, so do stories of heroism and joyous memories of lives cut far too short.