Background: The whole world is fighting the coronavirus, which has spread to nearly every point of the globe over the first three months of 2020. To control this quick spread, many countries were prosecuted for lockdown that caused a significant impact on all aspects of our daily lives. As the virus is spreading across the country, more than 90% of enrolled students were affected by some kind of limitation posed by the educational institutions, with more than a billion impacted around the world.

Objective: To assess the effect of online classes among secondary school students during COVID-19.

Methods: This was a Descriptive type of cross-sectional study. It was conducted from September 2022 to November 2022. Data were collected using self-administered structured questionnaire consisting of information about socio-demographic data and information about effect of online classes during COVID-19. The data were processed by computer and statistical analysis of data was carried out by using SPSS (Statistical Package for Social Science). A total of 100 participants participated in the study.

Result: Result showed that among 100 respondents' majority were in class ten (58.0%). Most of the respondents were female (52.0%) and all respondents were Muslim. 95.0% mentioned that they had the facility of online classes which was arranged by their school authority. 50.0% students enjoyed the online classes and agreed that they were benefited by online class. Most of the respondents 71.0% thought that online classes are not easy to understand for study material. 69.0% respondents expressed that physical classroom education is much better than online class. Majority 92.0% respondents were believed that online classes are effective during global emergency situation.

Conclusion: COVID-19 crisis on education system was unprecedented, which eventually became a reason to transform the physical classroom learning into online classes. From the findings of this study state that, students lost the motivation to participate in the online classes because of poor internet connection, monotonous nature of classes and lack of proper guidelines. Course curriculum must be informative and attentive. Must focus on the importance of teachers training about new teaching material of online education which is needed for encouraging student participation. This study strongly recommends for making the online classes more effective and inclusive by planning strategic method for the course curriculum of online education.