Achieving Gender Equity in the High School CS Classroom

I found that the simple acting of writing a promotional letter for the introduction to CS course and mailing it to all the students (both male and female) that performed well in either Geometry or Algebra II increased not only the quality of my students but more impressively, it almost completely evened out the gender ratio in my classrooms.  I went from having around 20% female students to just under 50%.