Effective Intervention strategies at the high-school level:

• Actively recruiting girls to high school computer science classes
• Getting the help of girls already taking computer science, especially if the girls that help are “movers and shakers”
• Educating counselors, teachers and parents
• Start recruiting girls when they are still in middle school
• Hold “all girl” events
• Revise course content and teaching practices to ensure assignments are interesting to girls, address the unequal prior experience of students, and avoid “boys locker room” atmosphere
• Feature software engineering concepts earlier as they reinforce girls’ interest in computer science