Advertising as a language instructor

European Commission's intranet thingy, you'll need to know someone who works there who can submit an advert - thinking there about those employees with children at European schools learning English as a 2nd or 3rd language.
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There are a few publications like AWAY magazine, another one with expatriate and Brussels in the title I think which is coloured in blue and black on the front (yes I can't remember its exact name), you'll find these lying around in some hotels, British shop, international schools.