"They were newly programmed to have direct frequency to talk directly to our safety and security coordinator and our deputy superintendent," Baumstark said. "It's a better option than cell phones and communication devices that may or may not work in a crisis situation."

Security training will also continue in the city's schools. Over the summer, NASCAR driver and Columbia native Carl Edwards paid for a training session for all employees in the district.

Along with training, a review of security plans will continue to ensure schools are as safe as possible.

All of the security upgrades did not come without a cost. The cameras, buzz-in systems and new radios cost the district around $140,000.

However, school officials have said they will spend whatever money they can to make security upgrades where needed.