When it comes to teaching math, she’s a zero.

Pascale Mauclair, a tenured, $75,000-a-year sixth-grade teacher in Queens, placed at the bottom of the heap of New York’s schoolteachers, according to rankings released by the Department of Education yesterday.

Mauclair got a cumulative score of zero, with a zero margin of error, for the 2009-10 school year.

Her rating was based on five years of data, indicating that DOE brass were confident she was ranked where she was supposed to be.

The score for the 37-year-old, who teaches at PS 11 Kathryn Phelan in Woodside — an “A”-rated school — was so low for each of the past five years that she got a zero cumulative score.

Mauclair refused to comment.

DATABASE: PERFORMANCE SCORES FOR NYC PUBLIC SCHOOL TEACHERS (ORGANIZED BY SCHOOL)

Also not making the grade were eighth-grade math teachers Miguel Ayala Jr., at JHS 125 in The Bronx, and Andrew Petrez, at IS 237 in Queens. Both got zero ratings with a zero error margin, as did Randolph Chapman, who teaches seventh-grade math at PS 202 in Brooklyn.

His PS 202 colleague, seventh-grade English teacher Yvonne Williams Gordon, also got a zero, based on five years of data. She and Chapman were by far the lowest-rated teachers at the D-rated school.

Keri Mackenzie, a teacher at PS 196 in The Bronx, scored a zero in fourth-grade reading with no margin of error, based on two years of data.

She also was ranked at a lowly 2 percent for her performance teaching fourth-grade math.

Linda Scragg, a fourth-grade teacher at PS 55 on Staten Island, rated a zero in reading and a 4 in math, based on two years of data.

None of the teachers at the C-rated PS 55 was rated better than average.

According to the DOE, 521 teachers were rated in the bottom 5 percent for at least two years.

Additional reporting by Kevin Sheehan and Daniel Prendergast