Corruption is a foremost concern for us, we have an extensive due diligence process that allows us to understand the operations of any school we fund. In Ghana, where we started we also have a trusted volunteer who is regularly in contact with the faculty to make sure they are conforming to the standards they agreed to. I think a similar volunteer will be essential in any area we expand to.
The problem I have with just donating to existing NGOs is I don't know where the money goes. Most just blend it into their general budget, I want to know that my dollars are creating direct and immediate change.