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Retiffy certificate RETIWR issued to Boyanka Boycheva from template tttnet poster2016 with values,template:tttnet poster2016,coutry:Bulgaria,prize:Won 3-rd prize in the international teachers’ contest for best educational practice “Attractive science education”, initiated and carried out in 2016 in the frames of the project “Teamwork, Training and Technology Network” (TTTNet). ,school:High School of Mathematics “Dr Petar Beron”,name:Boyanka Boycheva