For three years now, I (Nick Cowen) have been attending an English camp each summer run by the Language of Liberty Institute. I highly recommend this experience to all libertarian students and graduates with an interest in teaching. It involves meeting lots of young people in Eastern Europe (and now parts of East Asia and Africa), encouraging them to practise their conversational English and being willing to impart some aspect of the philosophy, social theory or economics underlying free societies. Besides being great practice for a variety of skills, it is a great way to make new friends and learn things for yourself. Teaching places are unfunded (although there might well be appropriate funding opportunities available within the network of libertarian societies) but the accomodation and expenses are relatively cheap. Check out their website for more details. This is their latest promotional video.