THREE-SUBJECTIVE DIDACTIC PHILOSOPHY IN FUTURE PRIMARY SCHOOL TEACHER’S PREPARATION SYSTEM Alexander Vladimirovich Spivakovsky – the first vice-rector of Kherson state university, doctor of pedagogy, professor, spivakovsky@ksu.ks.ua; Lyubov Evgenievna Petukhova –dean of preschool and elementary education faculty at Kherson state university,…