A great discussion over on America's blog: Do Catholic Elementary Schools Need More Male Teachers? 
Approximately 11 percent of teachers at Catholic elementary schools are male (including priests and brothers). Some say that is far too low.
The elementary school my kids attend has two male teachers on a staff of about 24 serving around 400 students. I'd say that is too low.
My oldest son had a bit of a shock when he moved to high school last year and had just two women among the eight teachers he saw every day.