'What do you say now?' Parkland survivors react to latest mass shooting

One thousand, two hundred miles away from the mass shooting unfolding at Santa Fe High School in Texas, students in Parkland, Fla., were struggling to process the footage they watched Friday.

In teacher Jeff Foster's AP Government class, what was supposed to be a celebration of the seniors last day at school quickly turned into a painful reminder of their own horrific experiences.

"When I was watching the news on my computer, I made the conscious decision to put it on the big screen and plug in the audio," Foster told NBC News after the Texas shooting. "Everybody stopped what they were doing and watched it.

"The students all seemed to be in disbelief and angry. Watching them, you could see, looking into the kids' eyes, you could see them remembering when they had cameras in their own faces three months ago."

Photos from the scene: 

40 PHOTOS
Shooting at Santa Fe High School
See Gallery
Shooting at Santa Fe High School
Emergency crews gather in the parking lot of Santa Fe High School where at least ten people were killed on May 18, 2018 in Santa Fe, Texas. - At least ten people were killed when a student opened fire at his Texas high school on May 18, 2018, as President Donald Trump expressed 'heartbreak' over the latest deadly school shooting in the United States. The shooting took place as classes were beginning for the day at Santa Fe High School in the city of the same name, located about 30 miles (50 kilometers) southeast of Houston.'There are multiple fatalities,' Harris County Sheriff Ed Gonzalez told reporters. 'There could be anywhere between eight to 10, the majority being students.' (Photo by Daniel KRAMER / AFP) (Photo credit should read DANIEL KRAMER/AFP/Getty Images)
SANTA FE, TX - MAY 18: (Editor's Note: Best images quality available) In this handout photo provided by the Galveston County Sheriff's Office, Dimitrios Pagourtzis poses for a mugshot after his arrest on May 18, 2018 in Sante Fe, Texas. Pagourtzis is suspected of killing 10 people and injuring 10 more in a mass shooting at a Sante Fe high school. (Photo by Galveston County Sheriff's Department via Getty Images)
SANTA FE, TX - MAY 18: Texas City Police Department SWAT vehicle leaves the scene at Santa Fe High School where a shooting took place on May 18, 2018 in Santa Fe, Texas. At least 10 people were killed when a gunman opened fire at Santa Fe High school. Police arrested a student suspect and detained a second person. (Photo by Bob Levey/Getty Images)
Law enforcement officers are responding to Santa Fe High School following a shooting incident in this Harris County Sheriff office, Santa Fe, Texas, U.S., photo released on May 18, 2018. Courtesy HCSO/Handout via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.
SANTA FE, TX - MAY 18: Sen. Ted Cruz (C) speaks as Texas Gov. Greg Abbott and Galveston County Judge Mark Henry look on speaks during a press conference about the shooting incident at Santa Fe High School May 18, 2018 in Santa Fe, Texas. At least 10 people were killed when a gunman opened fire at Santa Fe High school. Police arrested a student suspect and detained a second person. (Photo by Bob Levey/Getty Images)
SANTA FE, USA - MAY 18: Santa Fe High School closed after a lone gunman opened fire in Santa Fe, Texas, United States on May 18, 2018. At least 10 people were killed and 10 others injured in Texas on Friday after a gunman armed with a shotgun and a .38-caliber revolver opened fire at the Santa Fe High School. (Photo by Tharindu Nallaperuma/Anadolu Agency/Getty Images)
SANTA FE, TX - MAY 18: ATF agents arrive on location at Santa Fe High School where a shooter killed at least 10 students on May 18, 2018 in Santa Fe, Texas. At least 10 people were killed when a gunman opened fire at Santa Fe High school. Police arrested a student suspect and detained a second person. (Photo by Bob Levey/Getty Images)
SANTA FE, USA - MAY 18: Highway 6 closed by police officials after a lone gunman opened fire at Santa Fe High School in Santa Fe, Texas, United States on May 18, 2018. At least 10 people were killed and 10 others injured in Texas on Friday after a gunman armed with a shotgun and a .38-caliber revolver opened fire at the Santa Fe High School. (Photo by Tharindu Nallaperuma/Anadolu Agency/Getty Images)
SANTA FE, USA - MAY 18: Security forces take security measures back of Santa Fe High School after a lone gunman opened fire in Santa Fe, Texas, United States on May 18, 2018. At least 10 people were killed and 10 others injured in Texas on Friday after a gunman armed with a shotgun and a .38-caliber revolver opened fire at the Santa Fe High School. (Photo by Tharindu Nallaperuma/Anadolu Agency/Getty Images)
SANTA FE, USA - MAY 18: Police direct traffic at a road closure after a lone gunman opened fire at Santa Fe High School in Santa Fe, Texas, United States on May 18, 2018. At least 10 people were killed and 10 others injured in Texas on Friday after a gunman armed with a shotgun and a .38-caliber revolver opened fire at the Santa Fe High School. (Photo by Tharindu Nallaperuma/Anadolu Agency/Getty Images)
An FBI agent is seen in the parking lot of Santa Fe High School where at least eight people were killed on May 18, 2018 in Santa Fe, Texas. - At least eight people were killed when a student opened fire at his Texas high school on May 18, 2018, as President Donald Trump expressed 'heartbreak' over the latest deadly school shooting in the United States. The shooting took place as classes were beginning for the day at Santa Fe High School in the city of the same name, located about 30 miles (50 kilometers) southeast of Houston.'There are multiple fatalities,' Harris County Sheriff Ed Gonzalez told reporters. 'There could be anywhere between eight to 10, the majority being students.' (Photo by Daniel KRAMER / AFP) (Photo credit should read DANIEL KRAMER/AFP/Getty Images)
SANTA FE, TX - MAY 18: Texas City Police Department SWAT vehicle leaves the scene at Santa Fe High School where a shooting took place on May 18, 2018 in Santa Fe, Texas. At least 10 people were killed when a gunman opened fire at Santa Fe High school. Police arrested a student suspect and detained a second person. (Photo by Bob Levey/Getty Images)
SANTA FE HIGH SCHOOL, SANTA FE, TEXAS - MAY 10, 2018: DigitalGlobe satellite imagery of Santa Fe High School in Santa Fe, Texas. (Photo DigitalGlobe via Getty Images)
An FBI agent is seen in the parking lot of Santa Fe High School where at least eight people were killed on May 18, 2018 in Santa Fe, Texas. - At least eight people were killed when a student opened fire at his Texas high school on May 18, 2018, as President Donald Trump expressed 'heartbreak' over the latest deadly school shooting in the United States. The shooting took place as classes were beginning for the day at Santa Fe High School in the city of the same name, located about 30 miles (50 kilometers) southeast of Houston.'There are multiple fatalities,' Harris County Sheriff Ed Gonzalez told reporters. 'There could be anywhere between eight to 10, the majority being students.' (Photo by Daniel KRAMER / AFP) (Photo credit should read DANIEL KRAMER/AFP/Getty Images)
Emergency crews and police gather in the parking lot of Santa Fe High School where at least eight people were killed on May 18, 2018 in Santa Fe, Texas. - At least eight people were killed when a student opened fire at his Texas high school on May 18, 2018, as President Donald Trump expressed 'heartbreak' over the latest deadly school shooting in the United States. The shooting took place as classes were beginning for the day at Santa Fe High School in the city of the same name, located about 30 miles (50 kilometers) southeast of Houston.'There are multiple fatalities,' Harris County Sheriff Ed Gonzalez told reporters. 'There could be anywhere between eight to 10, the majority being students.' (Photo by Daniel KRAMER / AFP) (Photo credit should read DANIEL KRAMER/AFP/Getty Images)
SANTA FE, USA - MAY 18: Security forces take security measures around the site after a lone gunman opened fire at Santa Fe High School in Santa Fe, Texas, United States on May 18, 2018. At least 8 people were killed and several were wounded on shooting. (Photo by Tharindu Nallaperuma/Anadolu Agency/Getty Images)
TOPSHOT - Emergency crews gather in the parking lot of Santa Fe High School where at least eight people were killed on May 18, 2018 in Santa Fe, Texas. - At least eight people were killed when a student opened fire at his Texas high school on May 18, 2018, as President Donald Trump expressed 'heartbreak' over the latest deadly school shooting in the United States. The shooting took place as classes were beginning for the day at Santa Fe High School in the city of the same name, located about 30 miles (50 kilometers) southeast of Houston.'There are multiple fatalities,' Harris County Sheriff Ed Gonzalez told reporters. 'There could be anywhere between eight to 10, the majority being students.' (Photo by Daniel KRAMER / AFP) (Photo credit should read DANIEL KRAMER/AFP/Getty Images)
An FBI agent is seen in the parking lot of Santa Fe High School where at least ten people were killed on May 18, 2018 in Santa Fe, Texas. - At least ten people were killed when a student opened fire at his Texas high school on May 18, 2018, as President Donald Trump expressed 'heartbreak' over the latest deadly school shooting in the United States. The shooting took place as classes were beginning for the day at Santa Fe High School in the city of the same name, located about 30 miles (50 kilometers) southeast of Houston.'There are multiple fatalities,' Harris County Sheriff Ed Gonzalez told reporters. 'There could be anywhere between eight to 10, the majority being students.' (Photo by Daniel KRAMER / AFP) (Photo credit should read DANIEL KRAMER/AFP/Getty Images)
SANTA FE, TX - MAY 18: Emergency crews stage in the parking lot of Santa Fe High School where at least 10 students were killed on May 18, 2018 in Santa Fe, Texas. At least 10 people were killed when a gunman opened fire at Santa Fe High school. Police arrested a student suspect and detained a second person. (Photo by Bob Levey/Getty Images)
SANTA FE, TX - MAY 18: Emergency crews stage in the parking lot of Santa Fe High School where at least 10 students were killed on May 18, 2018 in Santa Fe, Texas. At least 10 people were killed when a gunman opened fire at Santa Fe High school. Police arrested a student suspect and detained a second person. (Photo by Bob Levey/Getty Images)
SANTA FE, TX - MAY 18: A Life Flight helicopter takes off from Santa Fe High School where a shooting took place on May 18, 2018 in Santa Fe, Texas. At least 10 people were killed when a gunman opened fire at Santa Fe High school. Police arrested a student suspect and detained a second person. (Photo by Bob Levey/Getty Images)
SANTA FE, TX - MAY 18: Emergency medical personnel stage in the Santa Fe High School parking lot where 10 students were shot and killed on May 18, 2018 in Santa Fe, Texas. At least 10 people were killed when a gunman opened fire at Santa Fe High school. Police arrested a student suspect and detained a second person. (Photo by Bob Levey/Getty Images)
Law enforcement officers are responding to Santa Fe High School following a shooting incident in this Harris County Sheriff office, Santa Fe, Texas, U.S., photo released on May 18, 2018. Courtesy HCSO/Handout via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.
SANTA FE, TX - MAY 18: ATF agents arrive on location at Santa Fe High School where a shooter killed at least 10 students on May 18, 2018 in Santa Fe, Texas. At least 10 people were killed when a gunman opened fire at Santa Fe High school. Police arrested a student suspect and detained a second person. (Photo by Bob Levey/Getty Images)
SANTA FE, TX - MAY 18: Emergency medical personnel arrive on location at Santa Fe High School where a shooting took place on May 18, 2018 in Santa Fe, Texas. At least 10 people were killed when a gunman opened fire at Santa Fe High school. Police arrested a student suspect and detained a second person. (Photo by Bob Levey/Getty Images)
#KHOU 11 "Three sources telling me that at least 8 students are dead in today's Santa Fe ISD school shooting. More… https://t.co/B68g7GYq9d
BREAKING UPDATE: Staff with @utmbhealth John Sealy Hospital in Galveston says several patients en route following a… https://t.co/95MhgmDl2H
DEVELOPING: Student claims shooter used a, “sawed off shotgun and pistol” in today’s shooting at Santa Fe High School in Galveston Co.
UPDATE: Shooter is a student in #SantaFeShooting, according to federal, local enforcement sources… https://t.co/CZgi8Zn1CM
We are assisting @SantaFeISD with a multiple-casualty incident at Santa Fe High School. This is no longer an active… https://t.co/XViFqsLpBS
One is in custody, a second one detained. An injured police officer is being treated, the extent of his injuries are unknown.
There are reports the gunman at Santa Fe High School threw pipe bombs into the classroom and opened fire. 8 people… https://t.co/oTikoP1d7A
#UPDATE Possible explosive devices have been located at the school and off campus. Law enforcement is in the proces… https://t.co/coVX7b7pIP
UTMB: 1 patient critical, 2 stable in fair condition. Surgery underway. Not expecting more patients. Closest L1 trauma hospital. #khou11
UTMB Hospital officials confirm John Barnes is their adult male patient listed in critical condition after Santa Fe… https://t.co/LGQIu7dd4d
.@GovAbbott confirms that there were 10 killed and 10 wounded in this morning's #SantaFe High School attack
SANTA FE, TX - MAY 18: Texas Gov. Greg Abbott speaks during a press conference about the shooting incident at Santa Fe High School May 18, 2018 in Santa Fe, Texas. At least 10 people were killed when a gunman opened fire at Santa Fe High school. Police arrested a student suspect and detained a second person. (Photo by Bob Levey/Getty Images)
SANTA FE, TX - MAY 18: (L-R) Sen.Ted Cruz, Texas Gov. Greg Abbott and Texas Lt. Gov. Dan Patrick speak to the media during a press conference about the shooting incident at Santa Fe High School where a shooting took place on May 18, 2018 in Santa Fe, Texas. At least 10 people were killed when a gunman opened fire at Santa Fe High school. Police arrested a student suspect and detained a second person. (Photo by Bob Levey/Getty Images)
SANTA FE, USA - MAY 18: Pearland Police vehicle parked on Highway 6 in front of Santa Fe High School after a lone gunman opened fire in Santa Fe, Texas, United States on May 18, 2018. At least 10 people were killed and 10 others injured in Texas on Friday after a gunman armed with a shotgun and a .38-caliber revolver opened fire at the Santa Fe High School. (Photo by Tharindu Nallaperuma/Anadolu Agency/Getty Images)
HOUSTON, May 18, 2018 -- A fire truck is deployed around Santa Fe High School in Texas, the United States, on May 18, 2018. Eight to ten people have been killed after a shooter opened fire inside Santa Fe High School Friday morning in the southeast of Houston, in the U.S. state of Texas, local police said. (Xinhua/Steven Song via Getty Images)
HIDE CAPTION
SHOW CAPTION
of
SEE ALL
BACK TO SLIDE

Law enforcement sources told NBC News that nine students and one teacher were killed at Santa Fe High School in Friday's mass shooting — the highest death toll in a school shooting since the Feb. 14 masacre at Marjory Stoneman Douglas that left 17 students and teachers dead.

In the wake of the carnage at that Parkland, Florida, school, a number of students launched a nationwide advocacy campaign to tackle the gun control issue and to register young voters to take the fight directly to pro-NRA politicians.

But Foster said it's going to be hard for his students to not feel shaken by the latest episode of gun violence.

"You go from saying, 'We won't let this happen ever again,' and then this happens," said Foster, whose 11-year-old and 6-year-old daughters reluctantly came to visit his school on Friday for the first time since the Feb. 14 mass shooting and were jarred by what they were seeing on the television news.

"What do you say now?"

On social media, several of the movement's leaders expressed their outrage and sorrow:

"Santa Fe High, you didn't deserve this," tweeted Parkland advocate Emma Gonzalez. "You deserve peace all your lives, not just after a tombstone saying that is put over you. You deserve more than Thoughts and Prayers, and after supporting us by walking out we will be there to support you by raising up your voices."

"Get ready for two weeks of media coverage of politicians acting like they give a sh-- when in reality they just want to boost their approval ratings before midterms," tweeted Parkland survivor David Hogg.

And within hours of the shooting, March for Our Lives, a group founded by the students, released a statement:

Foster said that many of the #NeverAgain advocates are spread across the country working on the campaign at the moment but that a meeting was already planned for tomorrow to discuss a voter registration drive. That meeting now is expected to take a different agenda.

"When you see something like this, it can either dampen a movement's spirit, or it can bring more people into the movement," said Foster.

Read Full Story