At least 50 percent of computer science students at your daughters' schools should be girls. If not, work to rectify the situation. Encourage schools to start a technical mentoring program aimed at girls. Expect and advocate for homework that includes complex problem-solving. Do not let boys monopolize the family computer.
Girls like to join clubs and take classes with friends.
Help them do this. Buy a girl a gift certificate to a computer store rather than clothing store. Spend time with your daughter on the computer. Let her teach you. Be involved in purchasing software.