New Jersey Gov. Chris Christie yesterday blasted a judge who ruled that his $1 billion cut in school aid last year failed the state’s neediest kids.

“The court’s legal mandates . . . have incontrovertibly contributed to our current fiscal crisis without uniformly improving education, particularly for the at-risk students the court claims to be helping with its rulings,” said Christie’s spokesman, Michael Drewniak, in a blistering statement after the judge’s report was issued.

“The Supreme Court should at last abandon the failed assumption of the last three decades that more money equals better education, and stop treating our state’s fiscal condition as an inconvenient afterthought.”

The governor was reacting to a report by Superior Court Judge Peter Doyne that read, “Despite spending levels that meet or exceed virtually every state in the country, and that saw a significant increase in spending levels from 2000 to 2008, our ‘at-risk’ children are now moving further from proficiency.”

Doyne had been chosen to investigate the issue by the New Jersey Supreme Court, which is weighing whether Christie’s cuts are constitutional after education advocates sued over them.

Christie says the cuts were necessary to deal with New Jersey’s $11 billion budget gap.

He has insisted that the reductions were doled out equitably — and that the changes really needed include eliminating lifetime teacher tenure and having students be able to more easily transfer to better schools.

But Doyne said the cuts “fell more heavily upon our high-risk districts and the children educated within those districts,” which prevented the state from providing a “thorough and efficient” education to New Jersey’s 1.4 million schoolkids.