(CNN) -- Outgoing New York City education chancellor Joel Klein on Friday reiterated his reasons for leaving his post as the longest-serving education chief of the nation's largest public school system.
After eight years in office, Klein told CNN that it was simply his time to leave.
"I have zero doubt that if I wanted to stay I would have," he said.
Klein called on the next administration to tackle what he described as continued inequalities and a lack of job preparedness within the school system.
"The mismatch between what the kids are prepared to do and what the workforce is going to demand is enormous and widening," he said.
Klein said he will become an executive vice president at News Corporation.
Under Klein, New York saw a sharp increase in the number of charter schools, a sometimes controversial system in which schools receive a mix of public and private money but operate independently.
His replacement, Cathie Black, is leaving her position as chairman of Hearst Magazines. She will be the first female to serve as education chancellor in New York.
Black is expected to assume the role of chancellor in the beginning of 2011 with Klein helping her with the transition, according to New York Mayor Michael Bloomberg.