Girls Who Code is an international nonprofit working to close the gender cap in technology.  Clubs are free after school programs for 6 - 12 grade teens to use computer science to impact their community and join the sisterhood of supportive peers and role models.

Clubs are designed to teach girls:
Sisterhood.
Club girls join a safe and supportive environment of peers and role models and learn to see themselves as computer scientists.  Beyond the Club, girls can tap into an alumni network of tens of thousands of girls across the country who are using computer science to solve problems they care about.
Code.
Clubs learn the concepts of loops, variables, conditionals and functions that form the basis for all programming languages -- whether they want to built a website, an app or a robot.  Returning Club girls can deepen their programming knowledge through extended activity sets.
Impact.
Club girls work in teams to design and build a Computer Science "CS" Impact Project that solves real world problems they care about through code.
GWC clubs are just limited to girls.