Lots of comment by e-mail on today's column. A teaching blog lists it as a "sad, achingly familiar tale." Here's one of several letters from readers, a teacher:

I was in Ed Morman’s Baltimore City Teaching Residency cohort and . . . I am yet a teacher in the city, in Cherry Hill, and I understand what Ed is saying.  Understand it completely . . . because here’s the really scary thing: Ed was good at his job.  Damned good at it.
How does it bode when someone who is very good at something gets chewed up like so much cud and left for unemployed?  Ed is a brilliant man.  Period.  He is no milquetoast.  Period.  He knew classroom management.  Period.  He knew his subject area so well that any fellow math teacher would be envious of his knowledge.  Period.
I liked him.  He was a professional.  But what now?  He was good, and now the city is one good man down.
Was he a quitter?  Absolutely, unequivocally, no!  The problem lies elsewhere, and until that problem is resolved, teachers like Ed are yet going to get chewed up and spit out.
Thank you for saying what you did about him and us.
Sincerely,
John C. Young