So all you teachers go away for the summer and this is what happens. 🙂 When you get back this fall , Skype will have fully released a new realtime voice translation feature. For free.
Right now it only supports a handful of languages but you can see this is going to be improved quickly. With this technology the developing world can have access to the educational resources of the first world. I believe the change that will bring will be profound. Check back in about 10 years to see the results.