A small school district about 25 miles east of San Antonio will now allow certain qualified teachers and staff members to carry a concealed firearm on campus. 

The La Vernia Independent School District Board of Trustees unanimously approved the Guardian Program on Monday. 

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In addition to already having a license to carry, staff members who want to become guardians must complete 20 hours at a firing range, 20 hours of classroom training, pass annual psychological exams, and take random drug tests, KSAT reports. 

La Vernia Texas school guns campus

A U.S. flag and Texas state flag is seen at half-mast at La Vernia High School during a vigil in the memory of those killed in the Sutherland Springs shooting on November 7, 2017.  (REUTERS/Jonathan Bachman)

About 80% of La Vernia ISD staff supported the Guardian Program in a survey that was taken before the board approved it, according to the local news outlet. 

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Aside from the Guardian Program, Texas schools can also have one school marshal per 400 students who can carry a firearm.