If you left a war zone – for example Syria – you couldn’t bring your high-school diploma. How can you assess their credentials without contacting the school? Block-chain? To be able to integrate refugees in their new countries, we need a method to revalidate their credentials quickly. What you need is an international Bach based on the Syrian curriculum. A potential solution is a test that is easy enough not to require any revisions, and hard enough to make sure people who haven’t done it can’t do it (and should be online, and safe enough).