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Retiffy certificate RETUXO issued to GEORGIOS VILLIAS from template tttnet poster2016 with values,name:GEORGIOS VILLIAS,template:tttnet poster2016,school:Varvakeio Model High School,coutry:GREECE,prize:Won prize for best educational practice in the international teachers’ contest “Attractive science education”, initiated and carried out in 2016 in the frames of the project “Teamwork, Training and Technology Network” (TTTNet).