Does anyone know the law or requirements of an Independent School to conduct background checks on all staff working directly with children?

I have a concerning situation at my DD's school in DC (DD is 2.5) and the response from the leadership was that the checks were done on an "as needed basis". Has anyone faced this or have law knowedge related to this. Thanks.

Has anyone successfully gotten out of a contract with a pre-school? Most of the schools require contracts that require you to pay the balance of your contract if you move your child from the school. If your child is moved based on concerns that you have as a parent - is there a way to get out of the contract without litigation. Please let me know if you have had a similar experience.