This paper explores the effectiveness of online classes in remote primary schools. Taking Bangladeshi Covid-19 situation into account it has tried to document the challenges and possibilities of online teaching-learning scenarios in remote primary schools. In order to do this, adapting the Qualitative method with a particular focus on the perspective of teachers, students and parents, data has been collected through interviews and a little observation of online classes. Therefore, data has shown that both teachers and students suffer from economic instability, poor internet connection, lack of technological equipment and skills though a few possibilities have been drawn out of online classes regarding the enhancement of digital skills and alternative ways of assessing and continuing classes during any instabilities of Bangladesh. Finally, based on the thematic approach of analysing data, the researcher has explored that, despite a number of challenges, remote primary schools' online classes may have a significant impact in the future, but they cannot completely replace or serve as a substitute for in-person instruction.

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5. Sovon Chakraborty, Md. Obaidur Rahman F.M. Mehedi, "Sentiment Analysis on Twitter Tweets about COVID-19 vaccines Using NLP and Supervised KNN Classification Algorithm "  Indonesian Journal of Electronical Engineering and Computer Science. Vol. 23, No. 1, July 2021, pp. 463~470 ISSN: 2502-4752, DOI: 10.11591/ijeecs.v23.i1.pp463-470

6. Md. Obaidur Rahaman, Mohammod Abul Kashem, SC, F.M, S.M, F.K Internet of things based electrocardiogram monitoring system using machine learning algorithm, Article Published in International Journal of Advanced Computer Science and Applications(IJACSA) August, 2022.)

7. Muhammad Golam Kibria Md. Mamunur Rashid, Md. Obaidur Rahaman ,Al-Akhir Nayan, Sabrina Afrin, IoT based Smart Water Quality Prediction for Biofloc Aquaculture,IJACSA) International Journal of Advanced Computer Science and Applications, Vol. 12, No. 6, 2021.

8. Obaidur Rahman, Mohammod Abul Kashem, Al-Akhir Nayan, Most. Fahmida, Fazly Rabbi, Marzia Ahmed, Mohammad Asaduzzaman “Internet of Things (IoT) Based ECG System for Rural Health Care”Article Published in International Journal of Advanced Computer Science and Applications(IJACSA), Volume 12 Issue 6, 2021.

9. Mohammod Obaidur Rahaman, Mohammod Abul Kashem and Mohammad Asaduzzaman Chowdhury. “ Analysis of Immunity System for Survival of COVID-19” Volume 2 - Issue 4, Mod Appl Pharm Pharmacol. 2(4). MAPP.000544.2021. DOI: 10.31031/MAPP.2021.02.000544. 

10. Al-Akhir Nayan; Muhammad Golam Kibria; Md. Obaidur Rahman; Joyeta Saha, “  River Water Quality Analysis and Prediction Using GBM” 2020 2nd International Conference on Advanced Information and Communication Technology (ICAICT), 2020, pp. 219-224, doi:10.1109/ICAICT51780.2020.9333492. ISBN:978-1-6654-2240-6. 

11. Marzia Ahmed, Mr. Obaidur Rahaman, Mostafijur Rahman and M. Abul Kashem “Analyzing the Quality of Water and Predicting the Suitability for Fish Farming in the Context of Bangladesh based on IoT” International Conference on Sustainable Technologies for Industry 4.0 (STI 2019) at Purbachal American City, Rupgonj, Bangladeh. [Scopus] 

12. Mohammod Obaidur Rahaman, Mohammod Abul Kashem “Cyber Physical System for Healthcare” International Journal of Advanced Research (IJAR), United Kingdom. November 2018. DOI URL: http://dx.doi.org/10.21474/IJAR01/7968,ISSN: 2320-5407 Int. J. Adv. Res. 6(10), 36-46.

13. Md. Obaidur Rahaman “Data and Information Security: A Modern Cryptographic Algorithm” International Journal of Advanced Research (IJAR), United Kingdom. October 2017. DOI URL: http://dx.doi.org/10.21474/IJAR01/5666, ISSN: 2320-5407 Int. J. Adv. Res. 5(10), 1508-1515

14. Md. Obaidur Rahaman, “Data and Information Security by using Elliptic Curve Cryptography” International Journal of Lambert Academic Publishing, July 2017.  ISBN(978-3-659-47487-3),P-ID(159172),Germany. https://www.morebooks.de/store/gb/book/1/isbn/978-3-659-47487-3,

15. “Data and Information Security in Modern World by using Elliptic Curve Cryptography” International Journal of Science and Academic Publishing, June 2017. p-ISSN: 2163-1484, e-ISSN: 2163-1492 2017; Vol 7 issue 2: page 29-44, USA.

16. Md. Obaidur Rahaman “Data and Information Security in Modern World” International Journal of Science and Academic Publishing, April 2017. p-ISSN: 2163-1484, e-ISSN: 2163-1492 2017; Vol 7 issue 1: page 12-21, USA.

17. Md. Obaidur Rahaman “Information Security: A Modern Cryptosystem of Symmetric and Asymmetric Key for Cyber Physical System” Journal of Applied Computer Science and Technology, Computer Engineering Division, IEB. http://www.iebbd.org/jcse/, Journal 2, Page no. 50-56.

18. Md. Obaidur Rahaman “Information security: A Modern cryptosystem of a public and a secret key“Multidisciplinary Journal of European University of Bangladesh. ISSN 2413-2632, Volume: 3, No: 3, January – June, 2018

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