Parents of public school students aren't happy, and they let Public Advocate Bill de Blasio know at an education forum rife with complaints about parent involvement, testing and school closings.

For nearly three hours de Blasio and a panel that included other elected officials and a representative from the Department of Education (DOE) listened as dozens of angry parents trudged to the microphone at Brooklyn Borough Hall to air their grievances.

The town hall was organized by de Blasio, a vocal advocate for more parent involvement in schools. The DOE official offered brief opening remarks, but said little else.

“There's just too much testing in schools,” said one parent, Martha Foote. She said she fears her second-grade son will be in for an unpleasant surprise next year when teachers begin preparing him for years of mandated testing.

Foote and other parents said they've raised concerns over testing, and a lack of parent involvement, but said the city hasn't responded. “The DOE refuses to listen to us,” Foote said.

Lisa Edstrom, a college professor with two children in Brooklyn public school, said her worries have also fallen on deaf ears. “I'm extremely frustrated,” she said. “I feel the DOE gives lip service to parent involvement.”

Edstrom said she was hopeful her PTA could help, but said she was worried the DOE has become too entrenched in its ways to change anytime soon.

After taking office in January, de Blasio promised to take on the issue of parent involvement, a point of contention ever since Mayor Michael Bloomberg took over control of the city's public schools in an effort to remake the system.

“I really believe we can't fix our schools unless we engage parents to the fullest,” de Blasio said at the forum, adding the meeting was meant to start a constructive dialogue. As a start he said he would continue pushing for legislation he introduced to City Council last year to mandate PTA meetings be webcast.

A city official said the legislation would have to be reintroduced in the session that started this year in order to move forward.