By Kate Pastor

All but one school in Riverdale/ Kingsbridge received A’s on their report cards this year.

Four schools — PS 7, The Multiple Intelligence School PS 37, The Robert J. Christen School, PS 81 and PS 310 — climbed to A’s in 2008/9, from C’s last year.

The only elementary or middle school not to receive an A was The David A. Stein Riverdale/Kingsbridge Academy, MS/HS 141, which notched up from last year’s C to a B.

Within District 10, all schools except for MS/HS 141 and one other got A’s, according to District 10’s Community Education Council President Marvin Shelton. Citywide, the Department of Ed reported that 84 percent of elementary and middle schools received A’s and 13 percent received B’s.

PS 24, which suffered a crisis of confidence under former Principal Philip Scharper last school year, got an F for environment but still maintained an A as its overall grade.

Andy Jacob, a Department of Education spokesman, said the reason the Department of Ed began giving grades for all categories separately last year instead of assigning a letter only to the final score, was to help illuminate such varying factors.

“We found that the letter grade kind of crystallizes for people exactly what they’re doing well and exactly what they need to improve,” he said, adding, “An A doesn’t mean a school’s where it needs to be.”

Still, high scores on progress reports can lead to school and principal bonuses, benefits Principal Rose Fairweather-Clunie of IN-Tech Academy hopes her school is entitled to.

“Not only did we get an A, but we got a high A,” she said, noting that even among A-rated schools, scores varied.

Likewise, failing scores are taken into account when the Department of Education decides which schools to close.

There’s no threat of the latter locally.

In the Riverdale/Kingsbridge area, every school’s grade either stayed the same or improved this year. Five of them — Bronx New School, PS 51; Sheila Mencher Van Cortlandt School, PS/MS 95; PS 360; The New School for Leadership and Journalism, MS 244 and IN-Tech Academy, MS/HS 368 — raised their grades from B’s to A’s.