"MIT App Inventor is an innovative beginner's introduction to programming and app creation that transforms the complex language of text-based coding into visual, drag-and-drop building blocks. The simple graphical interface grants even an inexperienced novice the ability to create a basic, fully functional app within an hour or less."
An Android drag and drop programming environment. Similar to Scratch. looks like there are a lot of tutorials and even a curriculum available if you dig through the site.
Help your students make their own Android apps with this useful tool from MIT. The site comes with some good tutorials and guides with example projects.
http://ictmagic.wikispaces.com/ICT+%26+Web+Tools