Probably not too surprising, but the American Federation of Teachers just announced that it has endorsed Hillary Clinton. From the press release:

Acting on behalf of its more than 1.4 million members, the executive council of the American Federation of Teachers today endorsed Hillary Clinton for the Democratic nomination for president, citing her proven ability to advance our nation's key priorities, and her bold plans for a stronger America.

"Our members have told us that they want a leader they can trust to strengthen public education, increase access to healthcare, promote commonsense economic priorities and secure America's place in the world," said AFT President Edward J. McElroy. "Hillary Clinton is that leader."

As Marc Ambinder points out, this happened on the day John Edwards was set to address the National Education Association.