Most likely it is a result of school districts afraid of law suits when hiring such individuals and refuse to do an extensive background check.
I have seen complaints that the teaching profession in the public school system is not coveted by graduates which is why most leave the profession or move over to private school teaching.
So as a result to fill the vacuum the public school systems are lowering the standards they have for teachers. Similar to the systematic destruction of lowering standards for law enforcement and the medical field.
The standards for teachers need to rise once more and become a coveted professional field by reforming the public school system. Increasing salaries isn't going to solve the multiple issues that plague the public school system.
The public school curriculum across many States in the America need to be reformed to return to solid basics. Fundamentals like understanding basic math, ratios, percentages, rates and basic trig/geometry. Civics needs to make a big come back along with home education on controlling spending, saving, preparing cost effective meals, etc.
School resource officers should always be on every school in the nation that are well trained as well as school staff that are well trained and armed.
It was not long ago where you couldn't just walk into a public school freely from the street. You had to walk through the administration office and gate to access the school and there was two school resource officers assigned to the school.
But all these basics that the public school system had were stripped away on purpose.
Most likely it is a result of school districts afraid of law suits when hiring such individuals and refuse to do an extensive background check.
I have seen complaints that the teaching profession in the public school system is not coveted by graduates which is why most leave the profession or move over to private school teaching.
So as a result to fill the vacuum the public school systems are lowering the standards they have for teachers. Similar to the systematic destruction of lowering standards for law enforcement and the medical field.