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The La Vernia Independent School District Board of Trustees unanimously approved the Guardian Program on Monday.
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.
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.
Aside from the Guardian Program, Texas schools can also have one school marshal per 400 students who can carry a firearm.