Does anyone know of any good ways of supplementing your income available to international school teachers? I'm considering a few weeks of work during the summer if there are appropriate summer camps. I'm a secondary english teacher with esl experience. I teach iGCSE and IB dip, but don't think I quite have the experience yet to become an exam marker, but perhaps there are some possibilities. I'm also aware that people do some work online. Any advice or ideas very much appreciated.