ALBANY — Mayor Bloomberg makes New Jersey Gov. Chris Christie look flexible and level-headed, teachers union honcho Randi Weingarten said yesterday.

“Chris Christie was willing to do the give and take that Mike Bloomberg is unwilling to do,” the American Federation of Teachers president told The Post.

“I don’t know what has happened to the mayor, but he’s no longer a partner in terms of trying to move a school agenda that is good for students.”

A Bloomberg aide slammed the comments as a defense of Weingarten’s successor as United Federation of Teachers president, Michael Mulgrew.