Actua’s National Girls Program, now over twenty years old, inspires girls and young women to fulfill their critical role as leaders in STEM. Hands-on all-girls programs encourage their engagement in STEM fields like engineering and computer science where women continue to be vastly underrepresented. The Actua network engages 10,000 girls annually in high-impact, all-girl programs. These programs provide girls with safe spaces to design, build, experiment, and explore. The programs are led by female instructors, role models and mentors who break down the still existing stereotypes about women in engineering and science. Girls programs offered by our network members include science clubs, day camps, overnight camps, conferences, career fairs and special events. These all-girls programs are delivered in addition to regular co‐ed programming.