The process to find his successor is already underway, but the governor says it makes sense to keep him on for now.
Christie has criticized the lack of progress in Newark schools and Janey was told on Tuesday that his contract would not be renewed.
Janey, who was appointed in 2008 by former Gov. Jon Corzine, has not said how long he plans to stay or where he will go next.
Christie and his schools chief will select Janey's replacement. Since 1995, the state Department of Education has had control of Newark schools.