A teacher who had his seventh-grade students draw male genitalia on the blackboard during health class has been barred from classes, school officials said.

The teacher, whose name was not made public, was assigned to administrative duties, and Superintendent Bernard Pierorazio will ask trustees to fire him, Yonkers schools spokeswoman Jerilynne Fierstein said Friday.

"There was no way we were going to let him be in front of children," she said.

Pierorazio said the teacher opened a lesson on human anatomy and sexuality by asking students in a class of boys and girls to volunteer to come to the board to draw the male anatomy.

Fierstein said the state's seventh-grade curriculum calls for the anatomy lessons, but "as a teacher you have to be sensitive and you have to look at the age-appropriateness of any activity that you ask a child to do. And this was just not appropriate."