Inside Chicago School's Extensive Security Measures

As more Newtown shooting victims are laid to rest, we take a look at how one school protects itself.
3:00 | 12/19/12

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Transcript for Inside Chicago School's Extensive Security Measures
Today the shattered community of newtown, connecticut, mourned the young teacher who died trying to protect her first grade class, while school districts across the country are now beefing up security. In the wake of this tragedy, schools nationwide are grappling with the difficult questions about keeping their students safe, including the debate over arming teachers with guns. Here's alex perez. Reporter: She came face to face with unthinkable horror and fought to save her first graders. Laid to rest today, 27-year-old sandy hook teacher vicki soto. Those remembers her we're green ribb ribbons, her favorite color. Her sister jillian, already know what the world is remembering, saying you have been a hero to me for a lot longer than five days. You've been my big sister, the one I've always looked up to. Among the mourners, family friend musician paul simon who performed "the sound of silence." Soto did everything she could to keep her school family safe and worried teachers across the country are desperately working to make sure another sandy hook never happens again. At middleton elementary in chicago, security measures begin the moment you set foot on campus with this camera equipped doorbell. The visitor rings the doorbell and the person inside can already see us. They can see you. They can see what kind of mood you're in, if you're angry and assess it if you get in one more layer towards the building. Reporter: The first set of locked doors only get you as far as the entryway. Hi, welcome to middleton. Reporter: The front desk then takes my i.D., Scans it and performs an instant criminal background check using a system called raptor. The technology has already spread to 8,000 schools across the country. There you go. Reporter: Once cleared, I get this bright orange lanier that visitors must wear. There are cameras watching your every move. Administrators can even pull up the cameras 24/7 on their smart phones. The superintendent and security consultant have invested more than $175,000 over the last two years beefing up security at the three schools in this tiny district in illinois. I don't know that there's too big a price tag to put on keeping your kids safe as they can absolutely be. Reporter: While administrators admit there's no way of making the school 100% safe and immune to threats, prevention is the focus. Classroom doors were updated to open inward and lock from the inside, eliminating the need to step out of the room if there's a threat in the hallway. And they're also considering bullet resistant glass for the building. Too often we hear we're not going to be able to afford that, and the truth of it is what we really cannot afford is a terrible incident. Reporter: In tiny wichita, texas, "the herald" school district is taking a different approach, arming teachers. I like it because it makes me feel safer. We don't have a police station here. Reporter: Since 2007, the district has allowed teachers with concealed handgun licenses to carry guns in the classroom, a controversial move, but one the superintendent is convinced will prevent a school shooting here. My goal is if someone comes in to try to hurt my little ones, that they are killed. Reporter: And since the nightmare at sandy hook, lawmakers across the country are pushing for a similar solution, armed teachers in classrooms. I wish to god she had had an m-4 in her office locked up. You should be able to carry your handgun anywhere in the state. Reporter: At edison high school in tulsa, oklahoma, armed guards patrol the hallways. What's up, buddy? Reporter: The gun, guards say, is necessary to be ready for the unexpected. We hoped that we would never have to use it. I hope I never have to use my gun. But with today being the way they are, I do have it and it's a resource that we would rely on and would use if we had to to keep someone safe. Reporter: But bill believes more guns, more bloodshed. He was principal when a 14-year-old gunman opened fire, killing three students. If teachers and principals had guns, I think a lot of innocent kids would be killed by the principals and the teachers trying to stop something. Reporter: As the gun debate grows louder, the community continues to mourn. This time, a tribute held at connecticut state university. Back in newtown, a familiar face and the sign of hope. Donna, the retired principal of sandy hook elementary, is returning to her old post. Charged with a difficult task of leading students and staff forward. Her presence, a small reminder of this community's commitment to each other after a tragedy that will never be forgotten. For "nightline," I'm alex perez in chicago.

This transcript has been automatically generated and may not be 100% accurate.

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