Everyone is talking about the power of science, technology, engineering and math (STEM) education in our country now, and more specifically, about empowering young women to be successful in STEM careers. From President Obama's Educate to Innovate campaign, to the Lean-In movement and the star-studded code.org video that went viral on YouTube earlier this year. But how do we transform these philosophical ideas into scalable programs that reach real girls around the world. How do we interest girls in inventing things? Here is the initial formula we used.