Grigoryan A, Ayvazyan G. PLANNING AS AN EFFECTIVE MEANS OF ORGANIZING AND CONDUCTING AN INTEGRATED LESSON IN SUBJECTS OF THE NATURAL SCIENCE CYCLE. Educ-21st-Century [Internet]. 2023 Jun. 23 [cited 2024 Jul. 3];9(1):90-101. Available from: https://journals.ysu.am/index.php/Educ-21st-Century/article/view/10309