Ravi Sankar Mandapaka, and Rama Mohan Prakash Nedunuri. 2020. “A Study on the Effectiveness & Challenges of Online Classes for Teachers and Students”. Technium Social Sciences Journal 13 (1). Constanta, Romania:286-96. https://www.techniumscience.com.techniumscience.pluscommunication.eu/index.php/socialsciences/article/view/1670.