Sitting in the same classroom, reading the same textbook,

Sitting in the same classroom, reading the same textbook, listening to the
same teacher, boys and girls receive very different educations. From grade
school through graduate school female students are more likely to be
invisible members of classrooms. Teachers interact with males more
frequently, ask them better questions, and give them more precise and
helpful feedback. Over the course of years the uneven distribution of
teacher time, energy, attention, and talent, with boys getting the lion's
share, takes its toll on girls. Since gender bias is not a noisy problem,
most people are unaware of the secret sexist lessons and the quiet losses
they engender.
-- Myra & David Sadker, Failing At Fairness:
-- How Our Schools Cheat Girls Gender Equity Resources