16 Dec 2015 08:18
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Arjan van der Meij
Den Haagte snel te vaak | kwartiermaker Maker Education | belangrijke getallen: e, π, 1/137 | #makered | leraar | vmbo-t havo vwo | natuurkunde ☢ | gek op @tempete |
web t.co/wLF5Mmi0XV
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