Hundreds of protesting teachers yelled out during the monthly meeting of the Panel for Educational Policy in Fort Greene, Brooklyn on Wednesday to show their opposition to the mayor's plan to overhaul 33 schools and replace up to half of their educators.

Recently, both Mayor Michael Bloomberg and Governor Andrew Cuomo have proposed hard tactics for education reform that will give teachers unions limited room for negotiation.

The teachers who filled the auditorium at Brooklyn Technical High School shouted, blew whistles and shook signs as the city school officials, including Schools Chancellor Dennis Walcott, tried to conduct business.

The United Federation of Teachers, which has 200,000 members, has vowed to fight the mayor's unprecedented plan to close, rename and reopen 33 public schools. Up to 1,750 teachers from those schools would be removed from their jobs, representing almost 3 percent of the city's teaching force.

"Teachers are very upset. They heard the mayor in the State of the City address, they heard what he said last year. They feel completely unsupported by this administration, the mayor and everyone on down," said United Federation of Teachers President Michael Mulgrew.

The mayor and schools chancellor defended the hardball approach towards the union, on a visit to a new small school in the Bathgate section of the Bronx on Wednesday morning. The city and union had failed to agree on new teacher evaluations for the 33 failing schools by a December deadline, and the mayor said he is now committed to the new plan.

"We have no choice because these schools are so ineffective, you have them at single-digit proficiency levels in some places," said Bloomberg.

"This process will continue and move forward, and so as the mayor indicated, we're very serious about this," said Walcott. "This is not a threat, this is not union negotiations, labor negotiations as far as these 33 schools."

The teachers who will lose their positions at the schools will still be part of the system, because union rules keep the mayor from firing them. They will serve as substitutes, costing more than $100 million a year.

Bloomberg said it is the cost of fixing education, but the teachers union said he is destroying schools, not saving them.

Next month, the PEP will vote to permanently close 19 schools and the middle schools of six others.

Later in the spring, the mayor will have the PEP vote on the overhauls of the 33 other schools.

If these 58 school closures and overhauls are approved, in addition to four charter schools also marked for closure, it will nearly triple the previous record for yearly school closings.