The developments now taking place constitute the greatest upheaval in school chemistry teaching in living memory. The problems it pre sents are as great in text-book authorship as in teaching, including as they do the implications of changing nomenclature and units as well as great modifications of syllabuses.- Hozir sodir bo'layotgan o'zgarishlar maktab kimyosini tirik xotirada o'qitishdagi eng katta to'ntarishdir. U taqdim etayotgan muammolar darslik muallifligida bo'lgani kabi, o'qitishda ham, shu jumladan nomenklatura va birliklarni o'zgartirish, shuningdek, o'quv dasturlarini katta o'zgartirishlar bilan bog'liq.