After three and a half years of failing to resolve technological issues, bumping heads with the teachers union, and losing friends with school board members, Los Angeles schools Superintendent John Deasy officially resigned as head of the second-largest school system in the country.

On Thursday, Deasy and School board member Steve Zimmer released a joint statement announcing the resignation.

"In that period of time, academic achievement rose substantially despite severe economic hardships, and the students of the district have benefited greatly from Dr. Deasy's guidance," the statement read, according to the Los Angeles Times.

"Needless to say this has been hard work, in fact exhausting work. I have neglected my family, my health, and my parent's heath. We all carry the ball for a while, and then give it to others to continue. ... I am proud and honored, but it is time for a transition," Deasy wrote, reports The Associated Press.

During his tenure, Deasy was slammed by critics when he tried to implement a $1 billion initiative to give students and faculty an iPad. As a result, his relationship with Apple, Inc. was investigated, while students suffered from being put in useless classes by the hands of the district's new computerized scheduling system. Other students were left without being assigned courses needed to graduate.

Referring to the iPad debacle, the school board cleared Deasy of any wrongdoing, saying in its statement that it "does not believe that the superintendent engaged in any ethical violations or unlawful acts."

In the interim, the Los Angeles Unified school board voted for former Superintendent Ramon C. Cortines to head the school system starting on Monday while officials search for a permanent replacement.

Cortines, who retired from the position in 2011 and was initially apprehensive to return to the job, said "I will give it my best shot," reports the AP. "The board and the superintendent have to be a team. It doesn't mean they always agree, but they have to respect each other and there has to be civility."

All six of the board members, expect for Monica Ratliff, voted to ratify Deasy's separation agreement.