That is around 18% of teachers willing to do the job.Based on the survey results, RAND estimated that about 550,000 of the nation’s roughly 3 million public school teachers would be personally interested in being armed at school. The majority of those teachers (roughly 358,000) would be women in rural or suburban schools, the RAND report says.
For example if Uvalde was "average" there would be around 50 teachers out of 279 willing to do the program. The district could pick up the entire cost for guardian training and perhaps a few school marshals to replace the 1 officer they would have to let go. That would average 6 guardians/marshals per school, which would certainly make the schools a substantially harder target.