I just came back from doing the program in Botswana with Skillshare. It was a bit different from me because I grew up there before moving back to England. But I'm writing a weekly blog about the experience if anyone wants to know more its here... http://botswanainsideout.wordpress.com/. Even if you don't I thoroughly recommend it. It's about more just doing some good abroad. For the volunteers in Botswana it was more about how the work you did changed your perspective on your own world how you could use that moving forward.
I talk about my voluntary experiences, it's a little slow now due to school but I try to update whenever I do something and try to encourage more people to do the same by providing relevant info and links