My wife is a high school maths teacher, and is considering starting a programming club for 13-17 years olds who show an interest. Their interest seems to be around Apps and Android which I have little experience of.

The kids would be (presumably) interested in programming, and have a fairly high level of computing knowledge. We would provide them with resources and some knowledge, but hopefully a lot would be self guided. I'm hoping stack overflow'ers can provide some tips or starting points. Specific things I think I'll need are;

• A development Environment; Currently I'm looking towards Java and Android, developed in Eclipse, probably installed on donated older hardware

• Some initial direction; There seem to be a plethora or 'start android' tutorials, so some recommendations for good ones are valuable, as are recommended paper books

• A Target; Some final project they should be shooting for

• A Route; This is where I'm most stuck, how to lead them through the required Java concepts and learning they would need

Some related questions already out there
Language+IDE for teaching high school students?
Teaching "web design/development" to high-school home-school group. Good sources?
How can I bootstrap a software development community at my school?