In a shocking incident, teachers at a Texas country school packed a gun along with their lesson plans when classes started this week.

The isolated, 110-student school near the border with Oklahoma is thought to be the first in the United States to allow guns in the classroom.

School officials say arming teachers is the only way to protect the old brick schoolhouse, which sits 30 minutes from the nearest police station.

"How do you stop the angry person without enough sense?" said Superintendent David Thweatt of the Harrold Independent School District.

"It's not going to take very long for it to be a total massacre."

But critics say the risks of having guns around children far outweigh the potential threat of a crazed gunman.

"Which risk is more likely: that someone is going to accidentally set off a gun in class and God forbid hit a student, or someone will come in off the highway and start a random shooting spree?" said Doug Pennington, spokesman for the Brady Campaign to Prevent Gun Violence.

While random shootings grab headlines, they are extremely rare, Pennington said, adding that fewer than one percent of school-age homicide victims are killed on school grounds or on the way to and from school.

Pennington questioned whether teachers were adequately trained to respond in a crisis situation and said the school would be better off with a security guard -- the only people technically allowed to carry guns in Texas schools.