Technovation Challenge is a contest for high school students run by Iridescent, which uses online software called App Inventor.
The Technovation Challenge, which started again last week, reaches out to high school teachers, who recruit students to participate in the event. The contest has grown from 45 girls in 2010 to 230 last year. Organizers expect the number to reach 400 to 500 this year.
Such companies as Microsoft (MSFT), Twitter, Google (GOOG), and LinkedIn (LNKD) are hosting teams of girls and their female mentors and teaching assistants, who will create the apps.