1. INTRODUCTION
The number of computer science majors increased by 14% over the last two years, but enrollments are still nearly 50% below the count of early 2000 [6]. With CS-related fields expected to grow rapidly [4], there is a need for more computer science courses that engage students both in K-12 and the university level [16]. In the Summer of 2009 Google launched a pilot program with ten universities. They gave each university 20 Android phones and accounts to a yet-to-be-released tool, App Inventor for Android. The goal was to explore the use of this new visual language for building mobile apps. Here’s an except from the pilot announcement: