COVID-19 has affected human life completely and obviously the education sector is also not untouched from it, in this situation this article is bringing the picture of present days’ classrooms which are running on a virtual mode i.e. as online mode and how this online mode of education has changed the practices of teaching, learning and evaluation. The review of situations is describing and presenting the scenario of today’s classrooms, which has come into practice after the lockdown implemented for maintaining social distance as a prevention measure from corona affect. The present situation has emerged up as a challenge in education sector not only for the students but for teachers also, that how to continue teaching as well as learning in realistic and fruitful manner. Where teachers are dealing with the good teaching-learning and evaluation practices for the students, simultaneously students are also facing challenges with their real learning situation. Because the traditional mode has been completely closed during and after the lockdown, in this mode students were habitual to direct interaction with their teachers regarding educational matters and whereas nowadays students' community is completely dependent on the online mode. The study has concluded with the drawbacks as well as some positive sides of this online education mode during lockdown period especially in respect to the education and teaching-learning process.