GEMS YAKLAŞIMININ ORTAOKUL ÖĞRENCİLERİNİN KUVVET VE ENERJİ KONUSUNDAKİ ZİHİNSEL YAPILARINA ETKİSİ (The Effect of Gems Approach on Mıddle School Students' Cognitive Structures on Force and Energy) - Seda NASIRLIEL -Hanife Gamze HASTÜRK | Journal of History School