He's either lying about the job or he really over-exaggerates his persona for this place. No way someone as weird as him could keep it together enough for a job like that. Or any job really.
To be fair those kinds of places (schools for at-risk kids) tend to be chronically understaffed and easier to get hired at than one might think. I could see him being able to get hired but no way he'd be able to keep that job for as long as he has if everything he says here is true.