They do a lot of education programs that teachers can use in the classroom to get rids involved and active with global development issues. That seems like at least half their mandate. They also do some work overseas to actually help the poor. As stated by others, it's on their website, I looked it up yesterday.
So.... it's a parallel education system and some charity drives.
When I said 'nobody', I meant that their goals aren't commonly known. That is unusual for a charity. Can you name another one like that ? I'm somewhat familiar with their activities, generally, but people have been questioning them to me privately in the past.