More from Twitter.
Was it a random shot? Or not?
The Education Department's new proposed regulations for colleges of education have a gaping hole (or two).
He's the second to leave in two years.
'When one argues that testing 8-year-olds for nine hours is the way to give a child his civil rights, then moral authority is surely gone.'
Duncan announces new flexibility on teacher evaluation. Is it enough?
About teacher evaluation, Common Core, etc.
This may surprise you.
What question would you ask Duncan if you had the chance?
Arne Duncan's relations with the teachers unions are about to get more difficult.