The nation was brought together in mourning last December when 26 people, including 20 children, were shot and killed at a Connecticut elementary school.

It was the second deadliest shooting in American history, prompting press conferences and policy suggestions aimed at preventing another such massacre. The National Rifle Association made the largest waves when, in response to Sandy Hook, the lobbying group's Executive Vice President and CEO Wayne LaPierre called for armed police officers posted in every school.

"The only thing that stops a bad guy with a gun," LaPierre said at a press conference, "is a good guy with a gun."

From armed guards to arming teachers themselves, the question of what can and should be done to better protect students elicits strong responses. What is prudent and feasible remains subject to much debate in legislatures across the country.

South Dakota's state government has been quickest to move on the NRA's suggestion, enacting a law to allow school employees, hired security personnel or volunteers who complete a training program to carry firearms in schools.

Similar bills have been proposed in the Missouri House of Representatives this session. House Bill 70 would allow any teacher or school administrator with a valid concealed carry permit to possess firearms on school grounds without consent of school boards. Another, HB 276, aims to create voluntary "school protection officer" designations that, with completion of a training program and district approval, would allow the "officers" to carry weapons on school grounds and detain anyone he or she believes has violated state laws or school policies.

Dr. Kathleen Nolan, a program associate and lecturer at Princeton University who has extensively studied police presence in schools, disagrees with such proposed legislation.

"It's an irresponsible, knee-jerk reaction to the fear we are all experiencing. I think it's frightening, the idea of putting arms in teachers hands. First, it's impossible to ensure school personnel have the proper training, but perhaps even more importantly schools personnel and teachers lack the experience. No one knows how they will respond in a situation with a crazed gunman," Nolan said.

The Missouri bills are different from the School Resource Officer program, which currently has about 210 dues-paying members in Missouri and more than 10,000 nationally. SROs are commissioned police officers with additional training in the organization's "triad" of responsibilities: teacher, counselor and law enforcement officer.

"As police officers, we're teachers and we're counselors. The school resource officer puts on different hats and for, say, poverty-stricken kids, we're also that connecting link between them and the Department of Social Services, or the local health department," said Union, Mo. Police Officer Rod Tappe, vice president of the Missouri School Resource Officer Association Board and SRO at the Union R-XI School District.

Mo Cannady, executive director of National Association of School Resource Officers, advocates for SRO or school-based policing programs, "not just something that puts an armed guard in the school."

"We don't feel that is a long-term solution," Cannady said."

"You have buildings filled with lots of children and when you have a situation of a shooter in a building like that, the good guy needs to be more than just a private citizen."

Implementation of an SRO program at schools nationwide is estimated to cost between $2-$3 billion, while in Missouri, where schools are currently underfunded by about $600 million, the estimate is $100 million in added expenses.

Cannady acknowledges cost considerations make an SRO an unrealistic solution for some districts and supports communities being able to make decisions for themselves, as opposed to action by the federal or state government. Both the Missouri Department of Elementary and Secondary Education and Missouri School Boards Associations referred questions to the Missouri Center for Education Safety, a public-private partnership between the Missouri Department of Public Safety, the Office of Homeland Security and MSBA, which shared that sentiment.

"It needs to be a local decision by the school boards and they need to make sure they have good input and have good discussions with public safety officials and teachers and do this with eyes wide open," Executive Director Paul Fennewald said.

In Chillicothe

Per Chillicothe R-2 School District Superintendent Dr. Roger Barnes, one School Resource Officer is currently employed within the R-2 district.

"This officer is a certified law enforcement officer that works closely with the Livingston County Sheriff and Chillicothe Police Departments," Barnes said. "His duties require him to visit all campuses, [assisting] in keeping students and the public on school grounds in an orderly manner, [investigating] complaints and inappropriate activity, [supervising] student activities, and [serving] as a consultant for the school's Crisis Management Plan."

Originally, said position was funded through a Safe Schools grant, Barnes noted; however, said grant is no longer available, and the position is now funded solely by the Chillicothe R-2 School District.

The approximate cost of the position is $42,000.

"All safety measures are costly," Barnes said. "Additional state or federal funds for improving safety infrastructure and securing funds for school resource officers would be helpful.

"At times, it would be nice to have an additional School Resource Officer," Barnes continued. "Supervising... one preschool, three elementary schools, one middle school, one high school, an alternative school, and a vocational technical school can be a challenging task [for one person]. However, given the economic times, we are very fortunate to have [even one person in] this position."

Barnes said that he does not personally favor the arming of school teachers as a preventative measure against school shootings.

"Having a lost, misplaced, or stolen firearm in a public school would be a recipe for disaster," he said.

Instead, Chillicothe R-2 recently revised its Crisis Management Plan "with input and revisions reviewed and approved by local law enforcement and fire and rescue departments."

"Since the Sandy Hook tragedy, all elementary schools have [had] camera doorbells installed," added Barnes. "Additional locked door measures have been implemented in all school buildings."

The National Association of School Psychologists issued a report in January advising schools to focus on security solutions such as building entrances, hallway monitoring and better check-in and check-out systems for visitors. It also recommends increasing mental health services and supports in schools, advising a ratio of one counselor for every 250 students, one school psychologist for every 500-700 students and one school social worker for every 400 students.

Nolan believes most schools are not meeting those targets and said even those ratios fall short of what is needed, arguing that more attention is needed for "subtle" discipline problems, such as bullying, as well as mental health issues, all of which can be precursors to violence.

"Some forms are subtle and it's apparent that school administrators and teachers are not picking up on how pugnacious this is," she said.

"Students who are alienated and not getting necessary attention and support, with mental health issues going unrecognized, can end up being the shooters," she said.

Chillicothe High School Principal Brian Sherrow says the R-2 district will be adding another counseling position next year, though such was not in response to callouts from NASP after the recent shootings.

"It's not as much in response to Sandy Hook," Sherrow said. "We felt this was a priority to meet the needs of our students."

That will make 2.5 counselors (two full-time and one part-time) for CHS in 2013-14 — one Freshmen-Sophomore counselor, one Junior-Senior counselor, and one college- and career-ready counselor. Sherrow noted the district follows DESE regulations over those presented by NASP — one counselor for every 300 students recommended, and one counselor for every 500 students required.

"We don't have a district psychologist," he said. Instead, R-2 outsources such services, as well as those that are drug-related, etc.

"[Our counselors will] be the first line when students have problems, [though,]" he said. "[The new position] will allow us to get into the classrooms more, and to be able to have someone there for the kiddos if they need someone to talk to."

A 2010 Centers for Disease Control and Prevention report on violence stated the odds of a person ages 5-18 being victim of a homicide at school, on their way to school, or at a school-sponsored event was 1 in 2.5 million. The last time a Missouri student died in a school shooting was at Parkway South Junior High in 1983, when according to the Associated Press a case of bullying resulted in a murder-suicide.

Since then, hundreds of others have died from other causes, Fennewald said, including lack of working smoke detectors, drinking and driving and lack of seatbelt use.

"Let's take a holistic view of this," he said. "How are our children dying? [...] There are a lot of other things if we want to focus on student safety, things we can do to make our communities safer without putting more resource officers in our schools."

The NRA did not respond to repeated requests for comment on this story.

— The C-T's Drew Van Dyke contributed to this story.