KANSAS CITY, Mo. - Hundreds of colleges across the nation have purchased a training program that teaches professors and students not to take campus threats lying down but to fight back with any "improvised weapon," from a backpack to a laptop computer.

The program — which includes a video showing a gunman opening fire in a packed classroom — urges them to be ready to respond to a shooter by taking advantage of the inherent strength in numbers.

It reflects a new response at colleges and universities where grisly memories of the campus shootings at Virginia Tech and Northern Illinois University are still fresh.

"Look at your environment through the lens of survival," said Domenick Brouillette, who administered the course at Metropolitan Community College, which serves more than 20,000 students. "Survivors prepare themselves both mentally and emotionally to do what it takes. It might involve life-threatening risk. You may do something you never thought you were capable of doing."

Nearly 300 professors at Metropolitan Community College were shown the video as part of a training exercise before the first day of classes on this downtown campus. The training, produced by the Center for Personal Protection and Safety, a for-profit firm based in Spokane, Wash., is also available for the school's students.

The training drills teachers and students in a "survival mindset," said Randy Spivey, a former U.S. Department of Defense hostage negotiator who is executive director of the center. The center's roster includes retired FBI agents and others with federal law enforcement experience.

"There are two extremes. On the one hand is paranoia, and on the other is oblivion," he said. "We're just trying to get people to keep this on their radar."

The training discourages cowering in a corner or huddling together in fear, Brouillette emphasized at the Kansas City session.