With the uptick in mass-shootings at schools nationwide and the increased security risks students face on a daily basis, should districts install security cameras in schools? An ever-present aspect of our daily lives, security cameras serve to protect citizens and catalog criminal behavior when others are not present to bear witness to crimes, but would having security cameras in schools infringe about student privacy and education?

VOCABULARY 180This is a question that is on the minds of many education professionals following a slew of violent crimes in the U.S. like the Newtown, Conn. shooting and the Boston Marathon bombing. Critics of security cameras in schools cite pervasive fear as a factor that is muddling our judgment and causing schools to amp up their safety and surveillance measures.

Critics also point out that Newtown’s Sandy Hook Elementary School, where 26 students and staff members were killed in December, already had video surveillance cameras and a buzzer entrance system, which allowed approval of all visitors seeking to enter the school. Those measures, though, were little protection against a determined killer with powerful guns.

Sending children to an environment in which they are under a constant state of surveillance does not come without some caveats, critics of the practice say.

“Constant surveillance, from the time children enter school to the time they leave, teaches the wrong thing about the relationship between the citizen and the government in a democratic society,” said Jay C. Stanley, a senior policy analyst for the American Civil Liberties Union in Washington.

Since the Sandy Hook massacre, more than 400 bills related to school safety have been proposed in state legislatures, according to a recent Education Week analysis. At least 62 of the bills directly concerned building safety upgrades, which can include school surveillance cameras.

“Any time something like what we saw at Sandy Hook Elementary happens, it encourages more schools to [install cameras],” said Ronald D. Stephens, the executive director of the National School Safety Center in Westlake Village, Calif. “It sends school board members back to the drawing board.”

He noted that surveillance cameras first started finding a home in schools in the 1980s, after several school shootings, including those in Pearl, Miss., and Bethel, Ala.

Growing Demand

Stanley Security Solutions, a global company that provides security hardware to schools, hospitals, and governments, has seen an increase in demand for its products, including cameras, in recent months, with the most significant increase coming from near Connecticut and the New England region, where the Sandy Hook shootings, as well as a devastating bombing in April at the Boston Marathon, took place. In Boston, the nation saw how authorities’ strategic use of surveillance cameras helped to identify the suspects.

“In the pre-Sandy Hook environment, schools were going through the motions and paying due diligence to common threats,” said Bob Stockwell, a global technology leader with Stanley Security. “But that was on a much less violent timeline.”

Among the schools that have recently moved to bolster surveillance systems is Walpole High School in Walpole, Mass. The school has petitioned the town’s capital budget committee for funds to install additional security cameras for the past few years. Finally, last month, the town voted to approve allocating the funds.

Walpole High’s principal, Stephen Imbusch, said “Sandy Hook is probably one of the things that has pushed the funding this time around. People are more aware of the need for camera surveillance in schools.”

Once installed in schools, though, surveillance cameras are used not only for security from outside invaders, but also for monitoring inside threats and student behavior.

Mr. Imbusch said that in the 1,165-student high school, the existing security cameras have proven useful in determining what might have happened in certain disciplinary or criminal situations.

“They’ve primarily been used to solve any questions we might have,” said Mr. Imbusch. “And they may have some kind of quality I can’t assess—when people see a camera they may be less inclined to do something, so they’re preventive.”

Cheaper, More Advanced

Technological advances, such as enhanced remote capabilities, have also helped to lower the costs of buying and installing the equipment, making them more affordable for schools.

“They can now buy 10 cameras where they could afford two before, so they’re becoming more mainstream,” said Mr. Stockwell.

Likewise, cameras’ growing capacity to provide sharper images have enhanced their usefulness, while digital capture and storage capabilities make the footage easier to access, view, and share. School hallways aren’t simply being watched—some cameras are now capable of capturing and detecting motion and changes in temperature.

The shift from analog to IP, or Internet Protocol, cameras also means that surveillance footage can be easily shared with police, further upping the cameras’ appeal. But some, including Mr. Stanley of the ACLU, question the possible effects of having stored videos of children—videos that could be saved for years to come.

The footage from those newer cameras is stored centrally on a school’s information-technology platform. Because the platform may be owned by the county or state, in the case of public schools, police departments also have access to the platform.

Technological advancements have played a role in cameras’ use for security surveillance as well as education-related purposes, such as teacher professional development or evaluation. Cameras with 360-degree visual capability, for instance, allow users to take in an entire classroom to get a more comprehensive view of both the teacher giving the lesson and students’ engagement with it.

While progress in the way cameras operate and their abilities to monitor the halls where children spend a large portion of their days seems to create a sense of increasing safety for some communities, there are limits to the security they can actually provide in a crisis, some experts note.

“No one’s argued that video cameras would have done something at Sandy Hook,” said Mr. Stanley. “Cameras could have only done something after the fact, but in that case, the person wasn’t concerned about what happened after the fact. The pros and cons have to be thought out very carefully before changing the learning environment.”

Jason P. Nance, an assistant professor of law at the University of Florida, in Gainesville, said, “It seems to be accepted throughout the public, both socially and politically, that cameras are an acceptable way to monitor students. What people don’t realize sometimes is cameras are actually more intrusive than people think. Because their uses are not overt, like pat-downs or metal detectors, they don’t send out a prison-like vibe.”

Hidden Costs?

There are two social costs associated with school surveillance cameras, according to Mr. Nance. The first results from submitting students to a constant state of surveillance.

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