The gender gap in computing is getting worse and has severe implications for the U.S. economy. This research report by Accenture and Girls Who Code shows that the share of women in computing jobs is in decline and suggests that universal access to computing in schools will not address the gender gap. Only by tailoring courses to girls’ specific needs can we boost their commitment to computing. This report recommends a fresh approach that could increase the number of women in computing to 3.9 million by 2025. That would lift their share from 24% to 39% of the computing workforce and generate $299 billion in additional cumulative earnings. The greatest impact will come if we act now, starting with girls in junior high school and sustaining their interest throughout their education.