There is no way to protect yourself from this type of charge.
Never being alone in a classroom or anywhere else with any child makes no difference. The lies can be spread and you have no defense.
The girl’s family should be made to pay the legal fees and she ought to spend a couple of years behind bars.
“There is no way to protect yourself from this type of charge.”
Yes there is. If you work with children, work only in a location where you are supervised or visible by other adults the entire time. Spend only a minute or two in the restroom. Period.
This works for the gym where my kids practice. They do not take the little one’s to the bathroom - the parent must be present to do so. All coaches are observable 100% of the time, even in their break room. Since this is policy, there can’t be abuse. If a kid said someone took him alone it would be impossible.