A pool of teachers who principals don’t want to hire may be headed back into the classroom, the Daily News has learned.

City Schools Chancellor Carmen Fariña has had internal discussions with her staff about placing most of the 1,200 educators in full-time teaching jobs even though about half have disciplinary histories or unsatisfactory ratings, sources said.

The move would be a sharp reversal of a policy instituted under Mayor Michael Bloomberg in 2005 to have the teachers rotate as subs instead of foisting them on principals who didn’t want them.