I do a lot of searching for things on the internet in my work. So it was great to find something where I could feel that all of that searching would benefit a good cause. It may not be as good as actually giving to a charity myself, but at least it's something.
For certain stores, they also donate a percentage of the purchase amount to a charity.
Oh, and you can add a charity of your choice - which includes schools. I think that may just be for American charities though.
The drawbacks are it doesn't have the Australian option, like Google does. And also you can't search for news, blogs or scholarly articles, like you can with Google. But for everyone else, it seems to be working well.