This is really a simple issue, which can be easily addressed by taking more of your money. A ten year old boy with Asperger's syndrome (a high-function form of autisim spectrum disabilities) "wandered away" from his after-school program, ended up on a freight train in another state - and his Portland Public School teacher never even noticed that the kid was gone.
Obviously, we need to throw more money at problems like this. Or not. Here's a novel idea for PPS: maybe we should hire competent staff.