Dharmesh Arvindbhai Vaghela. EFFECTIVENESS OF POWER POINT PRESENTATION METHOD AND NORMAL METHOD IN THE TEACHING OF SCIENCE UNIT ‘CROP PRODUCTION AND MANAGEMENT’ FROM STD 8. ierj [Internet]. 2020 Aug. 15 [cited 2025 Mar. 19];6(8). Available from: https://ierj.in/journal/index.php/ierj/article/view/2107