How to fix the schools

Get rid of the unions. It is that simple.

Three strikes and he wasn't out.

At the beginning of his 32-year career as a math teacher in Queens, Francisco Olivares allegedly im pregnated and married a 16-year-old girl he had met when she was a 13-year-old student at his Corona junior high, IS 61, The Post learned.

He sexually molested two 12-year-old pupils a decade later and another student four years after that, the city Department of Education charged.

But none of it kept Olivares, 60, from collecting his $94,154 salary.

Imagine what the school system in New York could do with that $94,154 salary he is eating up doing nothing. I'm sure it could buy a lot of books or even pay for a teacher who could, you know, actually teach the students?

But this isn't a single incident. It's much worse than that.

Most of the 660 rubber-room teachers on the city payroll are awaiting disciplinary proceedings, but Klein has exiled "a handful" of duds like Olivares even though they have been legally cleared to return to class.

Last week, The Post reported that typing teacher Alan Rosenfeld, 64, was banned from the classroom in 2001 for allegedly making lewd comments to and leering at girls at IS 347 in Queens. Raking in $100,049 a year, he has spent time in a Brooklyn rubber room working on his law practice and overseeing more than $7 million in real-estate investments.

But of course these "teachers" are protected by the Union. And the school officials can't get rid of the bad teachers.