FEN EĞİTİMİNDE TASARIM ODAKLI DÜŞÜNCEYE DAYALI ETKİNLİK PLANI OLUŞTURMA SÜRECİ VE ÖRNEK ETKİNLİK (The Process of Creating an Activity Plan Based on Design Thinking in Science Education and Sample Activity) - Mehmet Burak AYGEN -Erdal CANPOLAT | Journal of History School